Developer Tools
Free, browser-based utilities for CS students and developers.
All tools run entirely in your browser — no data is sent to any server.
JSON Formatter
Format, minify and validate JSON. Instant syntax error detection with line/column info.
Regex Tester
Live regex match highlighting with flag support (g, i, m, s) and captured groups display.
Base64 Encoder / Decoder
Encode or decode Base64 instantly in your browser. Full UTF-8 support.
Hash Generator
Generate SHA-1, SHA-256 and SHA-512 hashes using the browser Web Crypto API.
JWT Decoder
Decode JWT tokens and inspect header, payload and expiry status — no data leaves your browser.
GPA Calculator
Calculate your GPA on the 4.0 scale. Enter courses, credit hours, and letter grades — instant results.
Word Counter
Count words, characters, sentences, and paragraphs. Estimate reading and speaking time instantly.
Citation Generator
Generate accurate citations for APA 7th, MLA 9th, Harvard, and Chicago styles. Free and instant.