Developer Tool Categories
Find a developer tool by topic instead of searching by name.
JSON
Format, minify, validate, or convert JSON and CSV in the browser. Formatting uses JSON.parse and JSON.stringify — comments and trailing commas are errors.
5 tools
Encoding
Encode or decode Base64 and URL (percent) encoding. Base64 is not encryption. URL encoding uses encodeURIComponent.
6 tools
Generators
Create UUIDs (v4), random passwords, and placeholder lorem text. Randomness comes from the Web Cryptography API where the tool says so.
4 tools
Web
Format or minify HTML, CSS, and JavaScript locally. Minification is conservative; check the output before shipping.
5 tools
Data & Debugging
Inspect JWTs (decode only), test regular expressions, convert Unix timestamps, and look up HTTP status codes or MIME types. Lookups do not fetch remote URLs.
7 tools