Developer Tools

Format and validate JSON, test regular expressions, encode and decode Base64 and URLs, generate UUIDs and hashes and build cron schedules, without pasting your data into a server.

JSON & data

DeveloperJSON Formatter & ValidatorPretty-print, validate and minify JSON with clear error messages. ConvertersJSON to CSV ConverterTurn a JSON array of objects into a CSV file you can open in Excel or Google Sheets. ConvertersCSV to JSON / Excel Table ConverterPaste or upload CSV and get JSON plus a spreadsheet-style table preview. TextDiff Checker (Text Compare)Compare two texts and highlight what was added, removed or changed.

Encoding & hashing

DeveloperBase64 Encoder / DecoderEncode or decode Base64 text, and turn images into Base64 data URIs. DeveloperURL Encoder / DecoderPercent-encode or decode URLs and inspect query parameters in a table. DeveloperSHA Hash GeneratorCompute SHA-256, SHA-384, SHA-512 and SHA-1 hashes as you type. DeveloperUUID v4 GeneratorGenerate random UUIDs/GUIDs in bulk with formatting options.

Testing & building

DeveloperRegex Tester & Cheat SheetTest regular expressions against text with live match highlighting. DeveloperCron Expression BuilderBuild cron schedules visually with plain-English descriptions and next run times. DeveloperCSS Grid & Flexbox GeneratorDesign CSS Grid and Flexbox layouts visually and copy the code. ConvertersMarkdown to HTML ConverterWrite Markdown and see the rendered preview and clean HTML side by side.

More developer tools

ConvertersColor Converter (HEX ⇄ RGB ⇄ HSL)Convert color codes between HEX, RGB and HSL with a live preview and shades. TextLorem Ipsum GeneratorGenerate placeholder text by paragraphs, sentences or words, optionally with HTML.

Workflows

JSON workflow: Format, validate & minify (JSON Formatter & Validator) → JSON → CSV (JSON to CSV Converter) → CSV → JSON (CSV to JSON / Excel Table Converter)