Paste your tokens, JSON, and configs without handing them to a stranger's server.
Every tool on this page runs entirely in your browser's own JavaScript engine. Open your network tab and check — nothing you type or paste is ever transmitted anywhere.
Tools
JSON Formatter & Validator
Format, validate, and minify JSON. Catches trailing commas and tells you the line.
JWT Decoder
Decode a token's header and payload, and see its expiry at a glance.
UUID & Hash Generator
Generate UUID v4 values and SHA-1/256/384/512 hashes via Web Crypto.
Regex Tester
Test a pattern against sample text and see matches, capture groups, and replacements live.
Timestamp Converter
Convert between Unix timestamps and human-readable dates, both directions, live.
Why this isn't like other online tools
Most "paste your JSON here" sites work the same way under the hood: your input goes to their server, gets processed there, and comes back. That's fine for a shopping list. It's a real problem when what you're pasting is an API response with a live key in it, a JWT with a session in it, or a config file with a database password in it — which is exactly the kind of thing people paste into these tools.
A typical online tool
- × Sends what you paste to a server
- × No way to verify what happens to it after
- × Ads, trackers, or an account wall
- × You take their word for the privacy policy
Vaultools
- ✓ Parses everything in your browser's own JS engine
- ✓ Zero network requests — open your dev tools and check
- ✓ No account for any free tool, ever
- ✓ Nothing to take our word for — you can verify it yourself
See it in action
Recordings of the real tools, not mockups — watch each one format, decode, or hash something in a few seconds before you try it yourself.
How it works →Who it's for
Built for anyone who'd rather not paste something sensitive into a stranger's server just to format it.
Developers
Decode a token mid-debug, format an API response, or generate a UUID for a fixture — without pasting real data into a site you've never heard of and hoping for the best.
Tinkerers & enthusiasts
People who like knowing how their tools actually work. Every tool here does one small thing you can watch happen — check the network tab, see for yourself, move on.
Anyone learning
Figuring out what a JWT actually contains, or why SHA-256 beats MD5? This is a safe place to try it on something real — even a secret you're about to rotate anyway.
Questions
Do you store or see what I paste?
No. Every tool runs entirely in your browser's own JavaScript engine — nothing is ever sent to a server. Open your browser's dev tools while you use any tool and check the network tab yourself.
Why should I believe that?
Don't — verify it. Every tool page shows a live "network requests sent: 0" counter, and your own dev tools will show the same thing: zero requests while you paste, format, decode, or hash.
Is it free?
Yes, fully — every tool is free with no account, no signup, and no limits. Pro adds batch processing and removes the small ad on pages like this one; see the Pro page for details.
Does Pro change the privacy model?
No. Pro only unlocks batch processing and hides the ad slot on non-tool pages. It doesn't add tracking or an account — just a license key stored in your own browser.