Small tools, carefully made
Our tools cover JSON formatting, validation and minification, plus Base64, URL, HTML entity and Unicode encoding and decoding. Each task has a direct address and a consistent workspace. The collection also includes UUID, Nano ID, and random integer generators, with configurable batch exports. Text & Regex adds case conversion, line sorting, duplicate-line removal, and JavaScript regular-expression testing. Date & Time tools convert timestamps and time zones, calculate dates, and parse or generate five-field Cron expressions locally. Cron provides a preview; it does not schedule jobs. Web & API adds JWT decoding, URL inspection, HTTP status lookup, request conversion and an API Request Tester.
Browser tools and explicit requests
Decoders, parsers, converters and generators process data locally. API Request Tester sends the selected URL, headers, authentication and body to your chosen endpoint only when you select Send. There is no server proxy, cloud saving or saved request history. Browser CORS and network policies still apply.
Free and straightforward
There are no accounts, paid tiers or advertisements in this release. We aim for useful defaults, clear limitations, and accessible controls.
Local hashing and security tools
Calculate hashes and HMACs, verify files, generate passwords, and work with bcrypt and AES. Encrypt or decrypt with matching mode, key, IV and encoding. GCM is the default authenticated mode. PBKDF2 / HKDF: This result is derived key material. Copy or download it only where you intend to use it. Processed on your device · no upload.
Local design and file processing
Frontend & Design converts colors, checks contrast, generates CSS styles and transforms CSS or HTML markup. Images & Files processes selected files locally for image conversion, compression, resizing, Base64 encoding, SVG optimization, QR creation and file inspection. No files are uploaded. Generated code, SVG and files should be reviewed before use; optimization is not sanitization and file signatures are not security checks.
Numbers, bases and byte-level inspection
Numbers & Bases converts numeral systems with exact large-integer arithmetic and marked fraction limits. Dedicated text/byte tools handle UTF-8 binary, standard ASCII and byte-order reversal; the Bitwise Calculator makes width and signed interpretation explicit. All calculations run locally in browser workers.