Overview
3 offline tools (JSON, Base64, hash) + launcher for 109 more at tools.zerethon.com. Right-click prefill, omnibox zt.
Zerethon Tools is a privacy-first toolkit + launcher for 112 free dev, creator, and web3 utilities. Three of the most-used tools run FULLY OFFLINE inside the extension — no network access, no data leaves your device. THREE TOOLS RUN OFFLINE (no internet required) • JSON Formatter — pretty / minify, indent control, sort keys, line+column error reporting. • Base64 Encoder & Decoder — UTF-8 safe, URL-safe variant, swap input↔output in one click. • Hash Generator — SHA-1 / SHA-256 / SHA-384 / SHA-512 via the browser's Web Crypto API. Hex (lower/upper), Base64, or Base64 URL-safe output. Open these from the launcher or right-click selected text on any page — the text is prefilled, ready to format/encode/hash. No network call, no log on our server. Airplane-mode safe. 109 MORE TOOLS — ONE CLICK AWAY Open as new tabs on tools.zerethon.com. The launcher searches all 112 by name, slug, or keyword. A few examples: SQL Formatter · UUID Generator · URL Parser · Color Converter · Markdown to HTML · CSV to JSON · YAML to JSON · Unix Timestamp Converter · UTM Builder · Regex Data Generator · Password Generator · Lorem Ipsum · Text Case Converter · Image Compressor · ETH Unit Converter · Wallet Address Validator · MD5 Hash Generator · … BROWSER-NATIVE SHORTCUTS • Right-click selected text → "Zerethon: Format as JSON / Decode Base64 / Encode Base64 / Hash (SHA-256) / Convert case / Parse URL". For the three offline tools the text is prefilled in the extension's own page. For the rest, the matching tool opens on tools.zerethon.com. • Type "zt" in the address bar → autocomplete any of 112 tools. • Pin the launcher to Chrome's side panel — keep it visible while browsing. • Ctrl+Shift+Z (Cmd+Shift+Z on Mac) opens the launcher. Customise the shortcut in chrome://extensions/shortcuts. PRIVACY (READ THIS — IT IS THE WHOLE POINT) • Zero analytics, zero telemetry, zero third-party SDKs. • Three permissions only — storage, contextMenus, sidePanel — plus a single host: tools.zerethon.com. No <all_urls>, no content scripts. • Favorites and recents are stored on your device only. • Selected text is never logged on our server. Either it stays inside the extension (offline tools) or it travels in a URL query parameter that the destination tool decodes client-side. • Full source MIT-licensed on GitHub. The submitted package is built reproducibly from source with `npm run build` — you can audit every line and rebuild the same zip locally. NO ADS. NO PAYWALL. NO SUBSCRIPTION. NO SIGNUP. Source: https://github.com/zerethonapp/extensions Privacy policy: https://tools.zerethon.com/extension/privacy Questions, requests, bug reports: support@zerethon.com
Details
- Version0.2.0
- UpdatedJune 1, 2026
- Size53.3KiB
- Languages2 languages
- DeveloperWebsite
Email
mr.vinhlv@gmail.com - Non-traderThis developer has not identified itself as a trader. For consumers in the European Union, please note that consumer rights do not apply to contracts between you and this developer.
Privacy
Zerethon Tools has disclosed the following information regarding the collection and usage of your data. More detailed information can be found in the developer's privacy policy.
Zerethon Tools handles the following:
This developer declares that your data is
- Not being sold to third parties, outside of the approved use cases
- Not being used or transferred for purposes that are unrelated to the item's core functionality
- Not being used or transferred to determine creditworthiness or for lending purposes
Support
For help with questions, suggestions, or problems, visit the developer's support site
