Runs locally • No uploads • No tracking
Built for developers
About ExtraTools.dev
ExtraTools.dev is a small collection of developer utilities designed for one goal:
help you debug and convert data fast, without exposing it to anyone.
Everything runs 100% in your browser, with a privacy-first approach by default.
Why this site exists
When you're working with production payloads, JWTs, config files, or user data, the last thing you want is to paste it into a random tool that uploads it somewhere.
ExtraTools.dev is built to be the safer default: quick tools you can trust, focused on practical workflows.
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Fast by design
Paste → result → copy. No accounts, no setup, no friction.
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Small, focused tools
Each tool does one job well, with predictable output.
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Built for real debugging
Useful defaults, clear formatting, and copy-friendly outputs.
Privacy is the product
The key differentiator is simple: your data stays on your device.
These tools are made for sensitive workflows—tokens, logs, payloads, internal files—without the risk of leaking them to a third party.
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No uploads
Tools run locally in the browser. Nothing is sent to any server.
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No tracking
No hidden analytics scripts collecting your usage or your inputs.
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No AI processing
Your content is never analyzed or used to “train” anything.
FAQ
Do you store my text, tokens, or files?
No. Inputs are processed locally and are not transmitted or stored. If you refresh the page, your content is gone unless you keep it yourself.
Are the tools free?
Yes. ExtraTools.dev is built to be lightweight and accessible. No accounts, no paywalls, and no forced signups.
Can I use these tools with production data?
That's exactly the point. These tools are designed to reduce risk compared to tools that upload your content. Still, always follow your company security policies.
What tools are available right now?
Base64 utilities (text + files), JSON/CSV converters, JWT tools, URL encode/decode, time converters, a text diff checker, and a file/payload size analyzer.
