Toolz.dev - Developer Tools by Liton Arefin
Search 160+ developer tools and run the common ones right here: Base64, JSON, URL encode, hash and case convert. Works offline, asks for one permission, and never sends what you paste anywhere.
Available on Firefox for Android™Available on Firefox for Android™
Scan the QR code to open this extension in Firefox for Android
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About this extension
Every tool on toolz.dev, one keystroke from wherever you are.
Press Alt+T, type three letters, hit Enter. No aiming at a toolbar icon, no
tab full of bookmarks, no remembering which site had the JSON formatter.
RUNS IN THE POPUP, OFFLINE
Five tools work without opening a tab and without a network connection:
• Base64 encode and decode, Unicode-safe
• JSON format and minify, with the parse error if there is one
• URL encode and decode, both encodeURIComponent and encodeURI
• SHA-256, SHA-384 and SHA-512 hashing
• Case conversion: camelCase, PascalCase, snake_case, kebab-case, CONSTANT
Whatever you paste is transformed in the popup on your own machine. It is
never uploaded, never logged, and never leaves the browser.
FINDS THE REST
Search the whole catalogue by name, keyword or category, or browse 28
categories: PDF, image, data, CSS, SEO, security, converters, calculators and
more. Favorite the ones you use and they stay at the top.
Type "tz" in the address bar to search without opening the popup at all.
WHAT IT ASKS FOR
One permission: storage, to remember your favorites on this device.
No account. No host permissions, so it cannot read or change the pages you
visit. No content scripts. No analytics, no tracking, no profile. Your
favorites are stored on your device and are never sent anywhere.
Free, no signup, no account: https://toolz.dev
Press Alt+T, type three letters, hit Enter. No aiming at a toolbar icon, no
tab full of bookmarks, no remembering which site had the JSON formatter.
RUNS IN THE POPUP, OFFLINE
Five tools work without opening a tab and without a network connection:
• Base64 encode and decode, Unicode-safe
• JSON format and minify, with the parse error if there is one
• URL encode and decode, both encodeURIComponent and encodeURI
• SHA-256, SHA-384 and SHA-512 hashing
• Case conversion: camelCase, PascalCase, snake_case, kebab-case, CONSTANT
Whatever you paste is transformed in the popup on your own machine. It is
never uploaded, never logged, and never leaves the browser.
FINDS THE REST
Search the whole catalogue by name, keyword or category, or browse 28
categories: PDF, image, data, CSS, SEO, security, converters, calculators and
more. Favorite the ones you use and they stay at the top.
Type "tz" in the address bar to search without opening the popup at all.
WHAT IT ASKS FOR
One permission: storage, to remember your favorites on this device.
No account. No host permissions, so it cannot read or change the pages you
visit. No content scripts. No analytics, no tracking, no profile. Your
favorites are stored on your device and are never sent anywhere.
Free, no signup, no account: https://toolz.dev
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More information
- Add-on Links
- Version
- 1.0.0
- Size
- 70.48 KB
- Last updated
- 6 days ago (Aug 23, 2026)
- Related Categories
- License
- All Rights Reserved
- Privacy Policy
- Read the privacy policy for this add-on
- Version History
- Add to collection