New tools and features on DevelZone, newest first.
Test a regular expression against your text with live highlighting, groups, replace, a plain-English explanation and ready-made code – on the real JavaScript, PHP (PCRE2) or .NET engine.
Every tool that works with harmless input now has a Share button that copies a link reopening the tool with exactly what you see.
Decode a JSON Web Token, see at a glance whether it is expired, verify HS256, RS256, ES256 or EdDSA signatures and edit and re-sign the claims – all in your browser.
Fifteen short pages answer specific questions – "unix timestamp to date", "cron every 5 minutes", "hex to rgb" – with the tool already filled in.
Measure the distance between two coordinates exactly on the WGS84 ellipsoid and with haversine, with bearings, rhumb line, midpoint and the route on a map.
Convert between HEX, RGB, HSL, OKLCH and more, tune colors with sliders, generate shades and check WCAG contrast with suggested fixes.
Compare two texts side by side or inline, down to the changed word, with options to ignore whitespace, case or JSON key order.
Turn a cron schedule into plain English, build one by clicking, and see the next run times in UTC and any time zone.
Generate random v4 or time-ordered v7 UUIDs and ULIDs in bulk, and decode the creation time hidden in a v7 UUID or ULID.
MD5, SHA-1, SHA-2, SHA-3, BLAKE3, CRC32 and more for text or files of any size, plus HMAC and checksum verification – computed locally.
Pretty-print, minify and validate JSON with every error listed by line and column – numbers and strings are kept exactly as written.
DevelZone has a new, faster design: a launcher that recognises what you paste, Ctrl+K search on every page, short URLs and pinned tools.
Before November 2026 DevelZone offered the Unix timestamp converter, URL / HTML / Base64 encoding, image to Base64, XML to JSON, degrees ⇄ decimal and the Exif reader – all still here, in the new design.