Browser-native utilities that run entirely on your device. No server, no tracking, no signup — your data never leaves the page.
Try it now → https://sierralx.github.io/Toolbox/
Single HTML file. No dependencies. No build step. Just open index.html or bookmark the link above.
| Tab | What it does |
|---|---|
| JSON | Validate, pretty-print and minify JSON, with clear error messages |
| Base64 | Unicode-safe encode / decode (emoji included) |
| URL | Percent-encode / decode text and URLs |
| UUID | Generate cryptographically random v4 UUIDs, one or ten at a time |
| Timestamp | Unix timestamp ⇄ date, two-way; auto-detects seconds vs milliseconds |
| Text | UPPER/lower/Title case, sort lines, remove duplicates, trim lines, remove empty lines, live word/char/line stats |
Every tool has one-click copy buttons. Tabs are deep-linkable (#json, #base64, …).
Everything runs locally in your browser with vanilla JavaScript. Nothing is sent anywhere — there is no backend to send it to.
MIT — see LICENSE.