Developer tools
Hashes, identifiers and encoding — the small utilities you reach for daily.
- Password GeneratorGenerate strong random passwords using your browser's cryptographic RNG, with a live strength estimate.
- Hash GeneratorCompute SHA-1, SHA-256, SHA-384 and SHA-512 hashes of text or files using the Web Crypto API.
- UUID GeneratorGenerate cryptographically random version 4 UUIDs in bulk, in several output formats.
- URL Encoder & DecoderPercent-encode and decode URLs and query strings, with a breakdown of each URL component.
- JSON Formatter & ValidatorFormat, minify and validate JSON with precise error locations, plus a collapsible tree view.
Other categories
- Image toolsConvert, resize and compress images without uploading them anywhere.
- File & dataMerge PDFs, reshape data files and encode text — all processed locally.
- Text toolsCount, clean and transform text for writing, editing and publishing.
- FinanceLoan payments, interest and percentages, with the full schedule shown.
- EverydayUnits, percentages and conversions that come up constantly.
- ConstructionStairs, concrete and roofing, checked against building code limits.