Code and dev

🔧

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