🔥 Popular tools
View all →
JSON FormatterHOT
Format, minify and validate JSON online with a tree view and error positions
URL Encoder and DecoderHOT
Encode and decode URLs online, including non-ASCII text and special characters
Base64 Encoder and DecoderHOT
Encode and decode Base64 text or images, including files to Base64
MD5 HashHOT
Generate MD5 hashes in 16 or 32 characters, upper or lower case, with batch input
Timestamp ConverterHOT
Convert between Unix timestamps and dates down to milliseconds, with time zones
IP LookupHOT
Look up the location and ISP behind any IP address, IPv4 and IPv6 included
Subnet CalculatorHOTNEW
Enter an IP and mask to get the network address, broadcast address and usable host range
URL ParserHOTNEW
Split a URL into scheme, host, port, path, query and fragment, then drop parameters and rebuild
UTM Link BuilderHOTNEW
Fill the five utm fields, pick from 18 channel presets, then get an encoded link with naming warnings
JSON ViewerHOTNEW
Explore JSON as a collapsible tree with search, formatting and minifying
Image ResizerHOTNEW
Resize images online in PNG, JPG, WebP, GIF and BMP formats
Image CompressorHOTNEW
Compress images online in PNG, JPG and WebP, with batch processing
Image Format ConverterHOTNEW
Convert PNG, JPG and WebP online with batch mode, quality control and background fill, no upload
Image CropperHOTNEW
Crop images online by dragging a selection, with ratio presets and exact pixel input
Rotate and Flip ImagesHOTNEW
Rotate and mirror images online with 90 degree shortcuts, fine angles and flips
App Store Screenshot MakerHOTNEW
Create app store screenshots with device mockups, custom backgrounds and captions
Image WatermarkHOTNEW
Add text or image watermarks online with drag positioning, rotation and tiling
Image MosaicHOTNEW
Blur parts of an image with a mosaic, by selection or full frame, with adjustable block size
GIF Frame ExtractorHOTNEW
Split animated GIFs into still frames with previews, single downloads and a ZIP export
Images to GIFHOTNEW
Turn several images into an animated GIF with drag sorting, custom frame delays and live preview
Photo CollageHOTNEW
Combine photos into creative layouts: heart, grid, circle, diamond and more
Perler Bead Pattern MakerHOTNEW
Turn photos into perler bead patterns with palette matching, color counts and manual editing
GCD CalculatorHOTNEW
Compute the greatest common divisor of several integers with the Euclidean steps shown
LCM CalculatorHOTNEW
Compute the least common multiple of several integers with the working and prime factorisation
Fraction CalculatorHOTNEW
Add, subtract, multiply and divide fractions with common-denominator and reduce steps
Hash CalculatorHOTNEW
Compute MD5, SHA1, SHA256 and SHA512 hashes, with HMAC and file hashing
Number Base ConverterHOTNEW
Convert numbers between bases 2 and 36, including huge values and text encoding
JavaScript FormatterHOTNEW
Beautify or minify JavaScript with indentation options and comment control
Text Sort and DedupeHOTNEW
Sort, deduplicate and extract duplicate lines from text lists
Text ExtractorHOTNEW
Extract phone numbers, emails, URLs, IP addresses, ID numbers and digits in bulk
Text CleanerHOTNEW
Clean text in bulk: trim spaces, drop blank lines, remove line breaks and HTML tags
Number to ChineseHOTNEW
Convert numbers to Chinese numerals and financial uppercase in bulk
Privacy MaskingHOTNEW
Detect and mask phone numbers, emails, ID numbers, bank cards and other private data
QR Code GeneratorHOTNEW
Generate QR codes with logo embedding, gradients, dot shapes, corner styles and SVG export
Barcode GeneratorHOTNEW
Generate CODE128, EAN-13 and CODE39 barcodes with custom colors and sizes
Period CalculatorHOTNEW
Predict your next period, ovulation day and fertile window from your last period and cycle length
BMI CalculatorHOTNEW
Calculate body mass index and compare it against WHO and Chinese standards
Mortgage CalculatorHOTNEW
Calculate monthly payments, total interest and full amortization schedules, comparing equal-payment and equal-principal loans
Income Tax CalculatorHOTNEW
Calculate monthly salary withholding and annual tax, and compare the two ways of taxing a year-end bonus
Unit ConverterHOTNEW
Convert ten categories of units in one view: length, weight, area, volume, temperature, speed, time, storage, pressure and power
Chinese ID Number CheckerHOTNEW
Validate the check digit of an 18-digit Chinese ID and read province, birth date, sex and age
Bank Card ValidatorHOTNEW
Run a digit-by-digit Luhn check, identify the card network and suggest the correct last digit
Lucky WheelHOTNEW
Spin a weighted wheel with custom options and remove winners between draws
Percentage CalculatorHOTNEW
Percent of a total, percentage change, discounts and tax, each with the formula shown
Age CalculatorHOTNEW
Calculate exact age, lunar nominal age, zodiac, days lived and a birthday countdown
Compound Interest CalculatorHOTNEW
Project compound growth with contributions, compare effective rates, CAGR and the rule of 72, and solve for term, principal or rate
GPA CalculatorHOTNEW
Weighted GPA from credits and grades, five scales, custom thresholds, letter grades and target GPA
Scientific CalculatorHOTNEW
Expression calculator with powers, factorials, trig, logs, DEG/RAD, Ans memory and batch evaluation
CSS Gradient GeneratorHOTNEW
Visually build linear, radial and conic CSS gradients with editable stops, six output formats and text contrast checks
Running Pace CalculatorHOTNEW
Convert between distance, time and pace, with split tables, negative-split plans and milestone times
Batch File RenamerHOTNEW
Rename thousands of files with templates and numbering, preview every row, auto-resolve collisions, then download a ZIP or a rename script
EXIF Viewer and RemoverHOTNEW
Read camera model, shooting settings, GPS location and embedded thumbnails, strip all metadata or GPS only, with batch and ZIP download
TOTP GeneratorHOTNEW
Turn a Base32 secret into the same 6-digit code as your phone authenticator, computed offline in JavaScript with HOTP, code lookup and clock drift checks
JSON to Code GeneratorHOTNEW
Generate TypeScript, Java, C#, Go, Python and Dart data classes plus JSON Schema from JSON samples, with nullability and type conflict inference
SQL Formatter and MinifierHOTNEW
Format SQL with a custom lexer: clause breaks, layered JOIN and CASE indentation, IN wrapping and safe single-line minification
Markdown to HTMLHOTNEW
Live Markdown to HTML with tables, task lists, fenced code, heading anchors and a table of contents, with copy and download
Workday CalculatorHOTNEW
Count workdays between dates, find the date N workdays away, and build monthly calendars with custom weekends and holidays
YAML to JSON ConverterHOTNEW
Two-way YAML and JSON conversion with block indentation, flow collections, block scalars, anchors and multiple documents
✨ New tools
View all →
Text Diff NEW
Compare two texts line by line with highlighted differences
Regex Tester NEW
Test regular expressions online with live highlighting and capture groups
Subnet Calculator NEW
Enter an IP and mask to get the network address, broadcast address and usable host range
URL Parser NEW
Split a URL into scheme, host, port, path, query and fragment, then drop parameters and rebuild
User-Agent Parser NEW
Parse a UA string into browser, engine, operating system, device and crawler
UTM Link Builder NEW
Fill the five utm fields, pick from 18 channel presets, then get an encoded link with naming warnings
Random Password Generator NEW
Generate strong random passwords with custom length and character sets
Chinese Converter NEW
Convert between Simplified and Traditional Chinese, including Taiwan and Hong Kong usage
JSON Viewer NEW
Explore JSON as a collapsible tree with search, formatting and minifying
Image Resizer NEW
Resize images online in PNG, JPG, WebP, GIF and BMP formats
Image Compressor NEW
Compress images online in PNG, JPG and WebP, with batch processing
Image Format Converter NEW
Convert PNG, JPG and WebP online with batch mode, quality control and background fill, no upload
Image Cropper NEW
Crop images online by dragging a selection, with ratio presets and exact pixel input
Rotate and Flip Images NEW
Rotate and mirror images online with 90 degree shortcuts, fine angles and flips
App Store Screenshot Maker NEW
Create app store screenshots with device mockups, custom backgrounds and captions
Image Watermark NEW
Add text or image watermarks online with drag positioning, rotation and tiling
Image Mosaic NEW
Blur parts of an image with a mosaic, by selection or full frame, with adjustable block size
GIF Frame Extractor NEW
Split animated GIFs into still frames with previews, single downloads and a ZIP export
Images to GIF NEW
Turn several images into an animated GIF with drag sorting, custom frame delays and live preview
Photo Collage NEW
Combine photos into creative layouts: heart, grid, circle, diamond and more
Perler Bead Pattern Maker NEW
Turn photos into perler bead patterns with palette matching, color counts and manual editing
SVG Preview NEW
Preview SVG files or pasted code with zoom, syntax highlighting and live rendering
SVG Converter NEW
Convert SVG to PNG, JPG or WebP online with custom size, quality control and one-click download
Image to SVG NEW
Wrap PNG, JPG or WebP images in SVG with embedded encoding for scaling without blur, one-click download
GCD Calculator NEW
Compute the greatest common divisor of several integers with the Euclidean steps shown
LCM Calculator NEW
Compute the least common multiple of several integers with the working and prime factorisation
Factorial Calculator NEW
Calculate factorials of non-negative integers, including large results, or list a range
Fraction Calculator NEW
Add, subtract, multiply and divide fractions with common-denominator and reduce steps
Fraction Simplifier NEW
Reduce fractions to lowest terms with the GCD steps shown, in bulk
Common Denominator Calculator NEW
Find the least common denominator for several fractions and show each conversion
Arithmetic Sequence Calculator NEW
Generate an arithmetic sequence, sum it, or solve backwards, with formulas and steps
Geometric Sequence Calculator NEW
Generate a geometric sequence, sum it, or solve backwards, with formulas and steps
Permutation Calculator NEW
Compute permutations A(n,r), list all arrangements, and show the formula
Combination Calculator NEW
Compute combinations C(n,r), list every subset, and show the formula
Text Set Operations NEW
Intersect, subtract and union two text lists, with dedupe and case options
Decimal Formatter NEW
Round, truncate, pad or group decimals in bulk across pasted text
Time Calculator NEW
Add or subtract days, hours, minutes and seconds, or measure the gap between two times
Hash Calculator NEW
Compute MD5, SHA1, SHA256 and SHA512 hashes, with HMAC and file hashing
UUID Generator NEW
Generate UUIDs in bulk with v4 random and v1 timestamp versions
Unicode Converter NEW
Convert between Chinese text and Unicode escapes in hex or decimal form
Number Base Converter NEW
Convert numbers between bases 2 and 36, including huge values and text encoding
JSON to Excel NEW
Convert JSON data into a spreadsheet with table preview and CSV download
Excel to JSON NEW
Convert Excel data to JSON by pasting tab-separated text
JSON to PHP NEW
Convert JSON data into PHP array code, with array and object syntax
JSON to CSV NEW
Convert JSON arrays into CSV with custom delimiters and download
JavaScript Formatter NEW
Beautify or minify JavaScript with indentation options and comment control
CSS Formatter NEW
Beautify or minify CSS with indentation options and size statistics
HTML Formatter NEW
Beautify or minify HTML with tag indentation and size statistics
HTML Tag Stripper NEW
Strip HTML tags and keep plain text, with optional tag filtering
HTML Entity Encoder NEW
Encode and decode HTML entities, and turn HTML into JavaScript strings
Text Encoder NEW
Convert text to binary, ASCII, full-width and half-width forms in one tool
Crontab Parser NEW
Parse cron expressions, preview the next runs and use common presets
Text Sort and Dedupe NEW
Sort, deduplicate and extract duplicate lines from text lists
Text Extractor NEW
Extract phone numbers, emails, URLs, IP addresses, ID numbers and digits in bulk
Batch Find and Replace NEW
Apply multiple find-and-replace rules at once, with regex and case sensitivity
Text Cleaner NEW
Clean text in bulk: trim spaces, drop blank lines, remove line breaks and HTML tags
Line Operations NEW
Bulk line edits: delete or truncate characters, add prefixes and suffixes, number lines
Chinese to Pinyin NEW
Turn Chinese characters into pinyin with tones, initials or aligned output
Number to Chinese NEW
Convert numbers to Chinese numerals and financial uppercase in bulk
Text Shuffle NEW
Randomly shuffle the characters or lines of a text
Lorem Ipsum Generator NEW
Generate Lorem Ipsum placeholder text in Latin or Chinese
Split and Merge Columns NEW
Split, merge and build Cartesian products from text columns with custom delimiters
Text Frequency Counter NEW
Count character, English word and keyword frequencies in a text
Privacy Masking NEW
Detect and mask phone numbers, emails, ID numbers, bank cards and other private data
QR Code Generator NEW
Generate QR codes with logo embedding, gradients, dot shapes, corner styles and SVG export
Barcode Generator NEW
Generate CODE128, EAN-13 and CODE39 barcodes with custom colors and sizes
QR Code Decoder NEW
Upload an image to read QR code content such as URLs, text and WiFi settings
Barcode Decoder NEW
Upload an image to read barcodes such as CODE128, EAN-13 and CODE39
File Hash Calculator NEW
Compute MD5, SHA-1 and SHA-256 hashes for many files at once with drag and drop
File Info Reader NEW
Read file name, size, type and modification time for many files at once
Text File Reader NEW
Open txt, json, csv and xml files in the browser with encoding selection
Random File Picker NEW
Pick a set number of files at random from an uploaded list
Filename Extractor NEW
Extract filenames from full paths in bulk, Windows and Unix styles
Filename and Extension Splitter NEW
Split base names from extensions in bulk, including compound extensions
Extension Case Converter NEW
Change extension case in bulk: all upper, all lower or capitalised
File Size Generator NEW
Create a test file of an exact size in KB, MB or GB with custom content
File to Base64 NEW
Encode any file as Base64: images, audio and arbitrary binary data
Text Merger NEW
Merge several text files into one with custom separators and ordering
Text Splitter NEW
Split a large text file by line count, size or delimiter into smaller files
Folder Batch Creator NEW
Generate a BAT, Shell or PowerShell script that creates many folders at once
Period Calculator NEW
Predict your next period, ovulation day and fertile window from your last period and cycle length
Countdown Timer NEW
Set a target date and watch a live countdown in days, hours, minutes and seconds
World Clock NEW
See the current time in major cities worldwide, with time zone comparison and offsets
Holiday Countdown NEW
Count down to Chinese public, lunar and solar-term holidays
Ganzhi Calendar NEW
Convert a Gregorian date into the sexagenary year, month, day and hour pillars plus the zodiac animal
BMR Calculator NEW
Calculate basal metabolic rate with Mifflin-St Jeor and Harris-Benedict, plus TDEE and macros
BMI Calculator NEW
Calculate body mass index and compare it against WHO and Chinese standards
Kinship Calculator NEW
Build a chain of relatives and get the correct Chinese kinship term in both directions
Body Fat Calculator NEW
Estimate body fat percentage from measurements and see lean body mass
Password Strength NEW
Rate password strength, analyse the character mix, and estimate cracking time
Mortgage Calculator NEW
Calculate monthly payments, total interest and full amortization schedules, comparing equal-payment and equal-principal loans
Income Tax Calculator NEW
Calculate monthly salary withholding and annual tax, and compare the two ways of taxing a year-end bonus
Unit Converter NEW
Convert ten categories of units in one view: length, weight, area, volume, temperature, speed, time, storage, pressure and power
Chinese ID Number Checker NEW
Validate the check digit of an 18-digit Chinese ID and read province, birth date, sex and age
Bank Card Validator NEW
Run a digit-by-digit Luhn check, identify the card network and suggest the correct last digit
Morse Code Translator NEW
Convert text to Morse code and back, with a reference table and adjustable audio
Lucky Wheel NEW
Spin a weighted wheel with custom options and remove winners between draws
JWT Decoder NEW
Decode JWT headers and payloads, explain each claim and verify signatures locally
Percentage Calculator NEW
Percent of a total, percentage change, discounts and tax, each with the formula shown
Age Calculator NEW
Calculate exact age, lunar nominal age, zodiac, days lived and a birthday countdown
Compound Interest Calculator NEW
Project compound growth with contributions, compare effective rates, CAGR and the rule of 72, and solve for term, principal or rate
GPA Calculator NEW
Weighted GPA from credits and grades, five scales, custom thresholds, letter grades and target GPA
Scientific Calculator NEW
Expression calculator with powers, factorials, trig, logs, DEG/RAD, Ans memory and batch evaluation
CSS Gradient Generator NEW
Visually build linear, radial and conic CSS gradients with editable stops, six output formats and text contrast checks
Running Pace Calculator NEW
Convert between distance, time and pace, with split tables, negative-split plans and milestone times
Certificate Fingerprint Extractor NEW
Read .cer, .crt, .pem, .der and .p7b certificates, compute MD5, SHA-1 and SHA-256 fingerprints, export the SPKI key and decode extensions
Privacy Policy Generator NEW
Generate a privacy policy or terms of service from your data practices, third-party SDKs and pricing, then export as text, Markdown or HTML
Batch File Renamer NEW
Rename thousands of files with templates and numbering, preview every row, auto-resolve collisions, then download a ZIP or a rename script
EXIF Viewer and Remover NEW
Read camera model, shooting settings, GPS location and embedded thumbnails, strip all metadata or GPS only, with batch and ZIP download
TOTP Generator NEW
Turn a Base32 secret into the same 6-digit code as your phone authenticator, computed offline in JavaScript with HOTP, code lookup and clock drift checks
JSON to Code Generator NEW
Generate TypeScript, Java, C#, Go, Python and Dart data classes plus JSON Schema from JSON samples, with nullability and type conflict inference
SQL Formatter and Minifier NEW
Format SQL with a custom lexer: clause breaks, layered JOIN and CASE indentation, IN wrapping and safe single-line minification
Markdown to HTML NEW
Live Markdown to HTML with tables, task lists, fenced code, heading anchors and a table of contents, with copy and download
Workday Calculator NEW
Count workdays between dates, find the date N workdays away, and build monthly calendars with custom weekends and holidays
YAML to JSON Converter NEW
Two-way YAML and JSON conversion with block indentation, flow collections, block scalars, anchors and multiple documents
Text tools
More →
Text DiffNEW
Compare two texts line by line with highlighted differences
Word Count
Count characters, words, lines and paragraphs as you type
Case Converter
Convert letter case and switch between camelCase, snake_case and kebab-case
Chinese ConverterNEW
Convert between Simplified and Traditional Chinese, including Taiwan and Hong Kong usage
Text Sort and DedupeHOTNEW
Sort, deduplicate and extract duplicate lines from text lists
Text ExtractorHOTNEW
Extract phone numbers, emails, URLs, IP addresses, ID numbers and digits in bulk
Batch Find and ReplaceNEW
Apply multiple find-and-replace rules at once, with regex and case sensitivity
Text CleanerHOTNEW
Clean text in bulk: trim spaces, drop blank lines, remove line breaks and HTML tags
Line OperationsNEW
Bulk line edits: delete or truncate characters, add prefixes and suffixes, number lines
Chinese to PinyinNEW
Turn Chinese characters into pinyin with tones, initials or aligned output
Number to ChineseHOTNEW
Convert numbers to Chinese numerals and financial uppercase in bulk
Text ShuffleNEW
Randomly shuffle the characters or lines of a text
Lorem Ipsum GeneratorNEW
Generate Lorem Ipsum placeholder text in Latin or Chinese
Split and Merge ColumnsNEW
Split, merge and build Cartesian products from text columns with custom delimiters
Text Frequency CounterNEW
Count character, English word and keyword frequencies in a text
Privacy MaskingHOTNEW
Detect and mask phone numbers, emails, ID numbers, bank cards and other private data
Privacy Policy GeneratorNEW
Generate a privacy policy or terms of service from your data practices, third-party SDKs and pricing, then export as text, Markdown or HTML
Code and dev
More →
JSON FormatterHOT
Format, minify and validate JSON online with a tree view and error positions
URL Encoder and DecoderHOT
Encode and decode URLs online, including non-ASCII text and special characters
Regex TesterNEW
Test regular expressions online with live highlighting and capture groups
JSON ViewerHOTNEW
Explore JSON as a collapsible tree with search, formatting and minifying
UUID GeneratorNEW
Generate UUIDs in bulk with v4 random and v1 timestamp versions
Unicode ConverterNEW
Convert between Chinese text and Unicode escapes in hex or decimal form
Number Base ConverterHOTNEW
Convert numbers between bases 2 and 36, including huge values and text encoding
JSON to ExcelNEW
Convert JSON data into a spreadsheet with table preview and CSV download
Excel to JSONNEW
Convert Excel data to JSON by pasting tab-separated text
JSON to PHPNEW
Convert JSON data into PHP array code, with array and object syntax
JSON to CSVNEW
Convert JSON arrays into CSV with custom delimiters and download
JavaScript FormatterHOTNEW
Beautify or minify JavaScript with indentation options and comment control
CSS FormatterNEW
Beautify or minify CSS with indentation options and size statistics
HTML FormatterNEW
Beautify or minify HTML with tag indentation and size statistics
HTML Tag StripperNEW
Strip HTML tags and keep plain text, with optional tag filtering
HTML Entity EncoderNEW
Encode and decode HTML entities, and turn HTML into JavaScript strings
Text EncoderNEW
Convert text to binary, ASCII, full-width and half-width forms in one tool
Crontab ParserNEW
Parse cron expressions, preview the next runs and use common presets
QR Code GeneratorHOTNEW
Generate QR codes with logo embedding, gradients, dot shapes, corner styles and SVG export
Barcode GeneratorHOTNEW
Generate CODE128, EAN-13 and CODE39 barcodes with custom colors and sizes
QR Code DecoderNEW
Upload an image to read QR code content such as URLs, text and WiFi settings
Barcode DecoderNEW
Upload an image to read barcodes such as CODE128, EAN-13 and CODE39
Chinese ID Number CheckerHOTNEW
Validate the check digit of an 18-digit Chinese ID and read province, birth date, sex and age
Bank Card ValidatorHOTNEW
Run a digit-by-digit Luhn check, identify the card network and suggest the correct last digit
JWT DecoderNEW
Decode JWT headers and payloads, explain each claim and verify signatures locally
CSS Gradient GeneratorHOTNEW
Visually build linear, radial and conic CSS gradients with editable stops, six output formats and text contrast checks
Certificate Fingerprint ExtractorNEW
Read .cer, .crt, .pem, .der and .p7b certificates, compute MD5, SHA-1 and SHA-256 fingerprints, export the SPKI key and decode extensions
JSON to Code GeneratorHOTNEW
Generate TypeScript, Java, C#, Go, Python and Dart data classes plus JSON Schema from JSON samples, with nullability and type conflict inference
SQL Formatter and MinifierHOTNEW
Format SQL with a custom lexer: clause breaks, layered JOIN and CASE indentation, IN wrapping and safe single-line minification
Markdown to HTMLHOTNEW
Live Markdown to HTML with tables, task lists, fenced code, heading anchors and a table of contents, with copy and download
YAML to JSON ConverterHOTNEW
Two-way YAML and JSON conversion with block indentation, flow collections, block scalars, anchors and multiple documents
Image tools
More →
Image ResizerHOTNEW
Resize images online in PNG, JPG, WebP, GIF and BMP formats
Image CompressorHOTNEW
Compress images online in PNG, JPG and WebP, with batch processing
Image CropperHOTNEW
Crop images online by dragging a selection, with ratio presets and exact pixel input
Rotate and Flip ImagesHOTNEW
Rotate and mirror images online with 90 degree shortcuts, fine angles and flips
App Store Screenshot MakerHOTNEW
Create app store screenshots with device mockups, custom backgrounds and captions
Image WatermarkHOTNEW
Add text or image watermarks online with drag positioning, rotation and tiling
Image MosaicHOTNEW
Blur parts of an image with a mosaic, by selection or full frame, with adjustable block size
GIF Frame ExtractorHOTNEW
Split animated GIFs into still frames with previews, single downloads and a ZIP export
Images to GIFHOTNEW
Turn several images into an animated GIF with drag sorting, custom frame delays and live preview
Photo CollageHOTNEW
Combine photos into creative layouts: heart, grid, circle, diamond and more
Perler Bead Pattern MakerHOTNEW
Turn photos into perler bead patterns with palette matching, color counts and manual editing
SVG PreviewNEW
Preview SVG files or pasted code with zoom, syntax highlighting and live rendering
EXIF Viewer and RemoverHOTNEW
Read camera model, shooting settings, GPS location and embedded thumbnails, strip all metadata or GPS only, with batch and ZIP download
Converters
More →
Timestamp ConverterHOT
Convert between Unix timestamps and dates down to milliseconds, with time zones
Color Converter
Convert between HEX, RGB and HSL values with an on-screen color picker
Image Format ConverterHOTNEW
Convert PNG, JPG and WebP online with batch mode, quality control and background fill, no upload
SVG ConverterNEW
Convert SVG to PNG, JPG or WebP online with custom size, quality control and one-click download
Image to SVGNEW
Wrap PNG, JPG or WebP images in SVG with embedded encoding for scaling without blur, one-click download
Encrypt and decrypt
More →
Base64 Encoder and DecoderHOT
Encode and decode Base64 text or images, including files to Base64
MD5 HashHOT
Generate MD5 hashes in 16 or 32 characters, upper or lower case, with batch input
Random Password GeneratorNEW
Generate strong random passwords with custom length and character sets
Hash CalculatorHOTNEW
Compute MD5, SHA1, SHA256 and SHA512 hashes, with HMAC and file hashing
Morse Code TranslatorNEW
Convert text to Morse code and back, with a reference table and adjustable audio
TOTP GeneratorHOTNEW
Turn a Base32 secret into the same 6-digit code as your phone authenticator, computed offline in JavaScript with HOTP, code lookup and clock drift checks
Math
More →
GCD CalculatorHOTNEW
Compute the greatest common divisor of several integers with the Euclidean steps shown
LCM CalculatorHOTNEW
Compute the least common multiple of several integers with the working and prime factorisation
Factorial CalculatorNEW
Calculate factorials of non-negative integers, including large results, or list a range
Fraction CalculatorHOTNEW
Add, subtract, multiply and divide fractions with common-denominator and reduce steps
Fraction SimplifierNEW
Reduce fractions to lowest terms with the GCD steps shown, in bulk
Common Denominator CalculatorNEW
Find the least common denominator for several fractions and show each conversion
Arithmetic Sequence CalculatorNEW
Generate an arithmetic sequence, sum it, or solve backwards, with formulas and steps
Geometric Sequence CalculatorNEW
Generate a geometric sequence, sum it, or solve backwards, with formulas and steps
Permutation CalculatorNEW
Compute permutations A(n,r), list all arrangements, and show the formula
Combination CalculatorNEW
Compute combinations C(n,r), list every subset, and show the formula
Text Set OperationsNEW
Intersect, subtract and union two text lists, with dedupe and case options
Decimal FormatterNEW
Round, truncate, pad or group decimals in bulk across pasted text
Time CalculatorNEW
Add or subtract days, hours, minutes and seconds, or measure the gap between two times
Percentage CalculatorHOTNEW
Percent of a total, percentage change, discounts and tax, each with the formula shown
GPA CalculatorHOTNEW
Weighted GPA from credits and grades, five scales, custom thresholds, letter grades and target GPA
Scientific CalculatorHOTNEW
Expression calculator with powers, factorials, trig, logs, DEG/RAD, Ans memory and batch evaluation
File tools
More →
File Hash CalculatorNEW
Compute MD5, SHA-1 and SHA-256 hashes for many files at once with drag and drop
File Info ReaderNEW
Read file name, size, type and modification time for many files at once
Text File ReaderNEW
Open txt, json, csv and xml files in the browser with encoding selection
Random File PickerNEW
Pick a set number of files at random from an uploaded list
Filename ExtractorNEW
Extract filenames from full paths in bulk, Windows and Unix styles
Filename and Extension SplitterNEW
Split base names from extensions in bulk, including compound extensions
Extension Case ConverterNEW
Change extension case in bulk: all upper, all lower or capitalised
File Size GeneratorNEW
Create a test file of an exact size in KB, MB or GB with custom content
File to Base64NEW
Encode any file as Base64: images, audio and arbitrary binary data
Text MergerNEW
Merge several text files into one with custom separators and ordering
Text SplitterNEW
Split a large text file by line count, size or delimiter into smaller files
Folder Batch CreatorNEW
Generate a BAT, Shell or PowerShell script that creates many folders at once
Batch File RenamerHOTNEW
Rename thousands of files with templates and numbering, preview every row, auto-resolve collisions, then download a ZIP or a rename script
Everyday tools
More →
Period CalculatorHOTNEW
Predict your next period, ovulation day and fertile window from your last period and cycle length
Countdown TimerNEW
Set a target date and watch a live countdown in days, hours, minutes and seconds
World ClockNEW
See the current time in major cities worldwide, with time zone comparison and offsets
Holiday CountdownNEW
Count down to Chinese public, lunar and solar-term holidays
Ganzhi CalendarNEW
Convert a Gregorian date into the sexagenary year, month, day and hour pillars plus the zodiac animal
BMR CalculatorNEW
Calculate basal metabolic rate with Mifflin-St Jeor and Harris-Benedict, plus TDEE and macros
BMI CalculatorHOTNEW
Calculate body mass index and compare it against WHO and Chinese standards
Kinship CalculatorNEW
Build a chain of relatives and get the correct Chinese kinship term in both directions
Body Fat CalculatorNEW
Estimate body fat percentage from measurements and see lean body mass
Password StrengthNEW
Rate password strength, analyse the character mix, and estimate cracking time
Mortgage CalculatorHOTNEW
Calculate monthly payments, total interest and full amortization schedules, comparing equal-payment and equal-principal loans
Income Tax CalculatorHOTNEW
Calculate monthly salary withholding and annual tax, and compare the two ways of taxing a year-end bonus
Unit ConverterHOTNEW
Convert ten categories of units in one view: length, weight, area, volume, temperature, speed, time, storage, pressure and power
Lucky WheelHOTNEW
Spin a weighted wheel with custom options and remove winners between draws
Age CalculatorHOTNEW
Calculate exact age, lunar nominal age, zodiac, days lived and a birthday countdown
Compound Interest CalculatorHOTNEW
Project compound growth with contributions, compare effective rates, CAGR and the rule of 72, and solve for term, principal or rate
Running Pace CalculatorHOTNEW
Convert between distance, time and pace, with split tables, negative-split plans and milestone times
Workday CalculatorHOTNEW
Count workdays between dates, find the date N workdays away, and build monthly calendars with custom weekends and holidays
Network tools
More →
IP LookupHOT
Look up the location and ISP behind any IP address, IPv4 and IPv6 included
Subnet CalculatorHOTNEW
Enter an IP and mask to get the network address, broadcast address and usable host range
URL ParserHOTNEW
Split a URL into scheme, host, port, path, query and fragment, then drop parameters and rebuild
User-Agent ParserNEW
Parse a UA string into browser, engine, operating system, device and crawler
UTM Link BuilderHOTNEW
Fill the five utm fields, pick from 18 channel presets, then get an encoded link with naming warnings