Small developer tools in the browser
Need a batch of UUIDs, a SHA-256 digest, pretty JSON, or a regex test? Open the page, paste, copy. Nothing is stored for these frontend tools.
Runs locally · Free · No install
Sound familiar?
- You open a throwaway site and hope it does not log what you pasted.
- A one-off UUID or Base64 should not need a new npm script.
- JSON from a teammate arrives as one line and you just want it readable.
- You need to check a regex before it goes into production code.
How it maps
| You start with | You get |
|---|---|
| Need ids | UUID batch |
| Need a digest | SHA-256 / SHA-512 |
| Messy JSON | Formatted + validated view |
| Pattern guess | Regex tester with live match |
Tools for this job
- UUID generator
UUID generator makes random unique IDs in your browser. Create one or up to fifty at once. Copy the list and paste into your app. Free, private, no upload.
- Hash generator
Hash generator creates SHA-256 and SHA-512 fingerprints from any text. Paste a string, copy the digest, and run it all free in your browser.
- Base64 encoder
Base64 decode turns coded text back to plain words fast. Encode and decode in one free tool. Paste your string, copy the result, and run it all in your browser.
- JSON formatter
JSON formatter online makes messy API data easy to read. Pretty print or minify JSON in your browser. Free, no sign-up, nothing leaves your device.
- Regex tester
Regex tester shows live matches on your sample text. Enter a pattern and flags, then see highlights and a match list. Free, private, no sign-up.
- Unix timestamp
Unix timestamp converter turns epoch seconds into a date, or a date into unix time. See local, UTC, and ISO at once. Free, private, no sign-up.
- CSS gradient
CSS gradient maker builds linear or radial CSS you can copy. Pick colors and angle, preview live, then paste into your stylesheet. Free online tool.
Need keyword research too?
Plus unlocks search-volume style checks in your account when free SEO teasers are not enough.
Common questions
Are secrets safe here?
Frontend tools do not upload your paste. Still avoid pasting production secrets into any website if you can use local tools instead.
Is there an API yet?
Public API and widgets are on the roadmap. See Pricing for the waitlist section.
Do I need an account?
Not for these free tools. An account is for favorites and paid plans.