Developer Tools
JSON, encoders, generators and formatters for developers.
Cron Expression Generator
Free cron expression generator. Build a valid cron schedule from simple dropdowns and presets, with a plain-English description of when it runs — copy and paste in seconds.
Cron Expression Explainer
Free cron expression explainer. Paste a cron string and get a plain-English description of when it runs, with a per-field breakdown — supports ranges, steps, lists and macros.
Regex Tester
Free online regex tester. Test regular expressions against your text with live match highlighting, capture groups and flags — instantly and privately in your browser.
Lorem Ipsum Generator
Free Lorem Ipsum generator. Create placeholder text in paragraphs, sentences, words or list items, with a one-click copy — perfect for mockups and designs.
Color Converter
Free color converter. Convert colours between HEX, RGB, HSL and CMYK with a live preview swatch and one-click copy — instantly and privately in your browser.
URL Encode / Decode
Free online URL encoder and decoder. Percent-encode text for safe use in URLs and decode %-encoded strings back to readable text — instantly and privately in your browser.
HTML Entity Encode / Decode
Free HTML entity encoder and decoder. Escape special characters and non-ASCII text to HTML entities and decode them back — instantly and privately in your browser.
JWT Decoder
Free JWT decoder. Paste a JSON Web Token to decode and inspect its header and payload, view standard claims and check expiry — all in your browser, nothing uploaded.
Hash Generator
Free hash generator. Create MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes of any text instantly in your browser, with one-click copy. Nothing is uploaded.
UUID Generator
Free UUID generator. Create cryptographically-random version 4 UUIDs in bulk with options for uppercase, no hyphens and braces — copy or download. Generated in your browser.
Base64 Encode / Decode
Free Base64 encoder and decoder. Convert text or files to Base64 and back instantly in your browser — Unicode-safe, with URL-safe and data-URI options.
JSON to XML Converter
Free JSON to XML converter — and XML to JSON too. Convert between JSON and XML instantly in your browser, with attributes, arrays and nested data handled cleanly.
CSV to JSON Converter
Free online CSV to JSON converter. Turn spreadsheet or database CSV exports into a clean JSON array of objects instantly in your browser, with full quoted-field support.
JSON to CSV Converter
Free online JSON to CSV converter. Turn a JSON array of objects into clean, Excel-ready CSV instantly in your browser, with a live table preview.
JSON Formatter & Validator
Free online JSON formatter, validator and beautifier. Pretty-print, minify, sort and validate JSON instantly in your browser.