Every developer utility
you actually need.
Free tools that run 100% in your browser: formatters, encoders, hash generators, regex testers, and more. Your data never leaves your device.
Browse by category
JSON
Format, validate, transform JSON
8 tools
Encoding
Base64, URL, HTML entity codecs
9 tools
Hashing & Crypto
MD5, SHA, HMAC, JWT, bcrypt
8 tools
Text
Counters, case, diff, markdown
9 tools
Dev Utilities
UUID, regex, cron, color
8 tools
Formatters
HTML, CSS, JS, SQL, XML
5 tools
Image
Compress, convert, resize
5 tools
Generators
Fake data, badges, gitignore
6 tools
Calculators
EMI, GST, salary, finance
3 tools
Merge, split, and edit PDFs in your browser
1 tool
Your data never leaves your browser.
Every tool runs entirely in your browser using JavaScript. Nothing is sent to a server, stored, uploaded, or sold. Paste tokens, hash passwords, decode JWTs, or process production data, completely freely, without hesitation.
Why Online Multi Tools
Privacy by design
All processing runs client-side in your browser. We never see your inputs, never log them, and never collect them.
Fast and lightweight
Static pages, no heavy frameworks on the wire. Tools open and respond instantly.
No signup required
No account, no email, no paywall, no banner ads or trackers. Just the tools.
Open and inspectable
Open your dev tools and verify yourself. Every action stays on your device.
Safe with secrets
Decode tokens, hash passwords, or test regex on production data. Nothing is uploaded.