All tools
Every tool here runs entirely in your browser. Nothing is uploaded to a server.
Developer Tools
- JSON Formatter & ValidatorBeautify, minify and validate JSON with precise error positions.
- Base64 Encoder & DecoderEncode or decode Base64 text, files and data URLs, with UTF-8 support.
- Cron Expression GeneratorBuild, explain and preview cron schedules in plain English.
- Password GeneratorGenerate strong random passwords and passphrases with an entropy readout.
- Regex TesterTest regular expressions live with match highlighting and capture groups.
- Unix Timestamp ConverterConvert Unix epoch seconds or milliseconds to a human date, and back.
- JSON to CSV ConverterConvert JSON arrays to CSV and CSV back to JSON, with nested key flattening.
- JWT DecoderDecode a JWT header and payload, and check its expiry — offline.
- UUID GeneratorGenerate cryptographically random UUID v4, time-ordered v7 and Nano IDs.
- Hash GeneratorGenerate SHA-256, SHA-384, SHA-512, SHA-1 and MD5 hashes of text or files.
- URL Encoder & DecoderPercent-encode or decode URLs and query strings, with a parameter breakdown.
Text Tools
- Text Diff CheckerCompare two blocks of text and highlight every added and removed line.
- Word & Character CounterLive word, character, sentence and reading-time counts as you type.
- Case ConverterConvert text between upper, lower, title, sentence, camel, snake and kebab case.
- Markdown to HTML ConverterConvert Markdown to clean HTML with a live side-by-side preview.
- Lorem Ipsum GeneratorGenerate classic or modern placeholder text by paragraph, sentence or word.
Converters
- Age CalculatorWork out an exact age, or the gap between any two dates.
- Color ConverterConvert between HEX, RGB, HSL, HSV, CMYK and CSS named colors.
- Percentage CalculatorWork out percentages, increases, decreases, discounts and tips.
- Number Base ConverterConvert numbers between binary, octal, decimal, hexadecimal and any base.
Image Tools
- Image CompressorShrink JPG, PNG and WebP images in your browser without uploading them.
- QR Code GeneratorCreate permanent QR codes for links, text, Wi-Fi and contact cards.
- Favicon GeneratorTurn an image, letter or emoji into a full favicon set plus the HTML.