Developer tools
Format, validate, encode, decode, and test.
Fast browser utilities for common implementation, debugging, and content-cleanup tasks.
JSON Formatter
Format, prettify, and minify JSON in the browser with instant syntax feedback.
Open toolJSON Validator
Validate JSON syntax, inspect parse errors, and view a clean formatted preview.
Open toolNewCSV ↔ JSON Converter
Convert CSV to JSON or JSON to CSV with header, delimiter, type-detection, and formatting controls.
Open toolNewYAML ↔ JSON Converter
Convert YAML to formatted JSON or turn JSON into readable YAML with configurable indentation.
Open toolNewSQL Formatter
Format SQL with dialect-aware rules, keyword casing, indentation, and query-spacing controls.
Open toolUUID Generator
Generate random UUID v4 values for tests, records, fixtures, and temporary identifiers.
Open toolJWT Decoder
Decode JWT header and payload sections, inspect claims, and check common token timestamps.
Open toolJWT Generator
Generate unsigned or HS256-signed JWT tokens from editable header and payload JSON.
Open toolRegex Tester
Build and test JavaScript regular expressions with live highlighting, match details, replacement previews, examples, and a guided syntax explanation.
Open toolBase64 Encode/Decode
Encode text to Base64 or decode Base64 back to UTF-8 text with optional URL-safe mode.
Open toolURL Encoder
Encode or decode URL strings and query parameter values with URI and component modes.
Open toolHTML Minifier
Minify HTML by removing comments and unnecessary whitespace for smaller snippets.
Open toolCSS Minifier
Compress CSS snippets by removing comments, whitespace, and unnecessary semicolons.
Open toolJS Minifier
Minify JavaScript snippets with a lightweight browser-side compressor for quick sharing and tests.
Open toolCron Expression Generator
Generate standard five-field cron expressions from presets and preview upcoming local run times.
Open toolColor Picker
Pick a color and copy matching HEX, RGB, and HSL values with simple palette variants.
Open toolMarkdown Preview
Write Markdown and preview the rendered output with safe browser-side conversion.
Open toolLearn the workflow