ToolsDeveloper tools
Developer tools
JSON, Base64, QR codes, regex, JWT, hashes, passwords, and more — all in your browser.
JSON Formatter
Beautify, minify, and validate JSON in your browser — private and free.
Base64 Encode / Decode
Encode text to Base64 or decode Base64 back to UTF-8 text in your browser.
URL Encode / Decode
Percent-encode or decode URL components safely in your browser.
UUID Generator
Generate one or many RFC 4122 UUID v4 identifiers with Web Crypto.
Hash Generator
Generate SHA-1, SHA-256, SHA-384, or SHA-512 digests in your browser with Web Crypto.
Password Generator
Generate strong random passwords locally with configurable length and character sets.
QR Code Generator
Generate a downloadable QR code from text or a URL — entirely in your browser.
Regex Tester
Test JavaScript regular expressions against sample text and inspect matches.
JWT Decoder
Decode JSON Web Token header and payload locally — no signature verification.
Color Contrast Checker
Check WCAG 2 contrast ratios between foreground and background hex colors.
Cron Expression Explainer
Explain standard 5-field cron schedules in plain language.
Word Counter
Count words, characters, sentences, paragraphs, and estimated reading time — privately in your browser.
Case Converter
Convert text to UPPERCASE, lowercase, Title Case, sentence case, camelCase, snake_case, or kebab-case.
Markdown ↔ HTML
Convert Markdown to HTML and HTML back to Markdown — locally in your browser.
About developer tools
Developer tools on mySutra help with everyday encoding, hashing, IDs, and JSON — without installing another desktop utility or pasting secrets into a random website.
Everything runs in your browser. Use them for debugging, demos, and local workflows where privacy matters.
Why local developer utilities matter
Many online “formatters” and “encoders” upload your payload. For tokens, customer data, or unfinished API drafts, that is a risk you do not need.
Keeping JSON, Base64, hashes, and passwords on-device keeps the feedback loop fast and private.
Frequently asked questions
Do these tools call an API?
No. Formatting, encoding, hashing, and password generation use built-in browser APIs only.