DevLogic Pro
DevLogic Pro unlocks an ad-free experience on dev.logicapplabs.com across every developer tool — JSON/CSS formatters, JWT decoder, password generator, Markdown preview, regex tester, and more. Everything runs in your browser with zero uploads. Your license includes the offline desktop app when it ships.
Key Features
- Ad-Free Web Access on dev.logicapplabs.com
- All 23+ Developer Tools Included
- Formatters, Security, DevOps & Design Utilities
- JWT, Password Generator, Markdown Preview
- 100% Client-Side — Zero Uploads
- Offline Desktop App When Available
- Lifetime License with Free Updates
- Complete Privacy — Zero Telemetry
per license · Lifetime updates included
Try free at dev.logicapplabs.com
The reason developers care that this runs locally
Pasting a JWT into a random web decoder means handing over a bearer token, its claims, and often the tenant and user IDs inside it. Pasting a config file into an online formatter means handing over whatever secrets are in it. Both happen constantly because the alternative is slower.
Every tool here decodes, formats, hashes, and generates in your browser. The JWT decoder never transmits the token, the password generator uses the Web Crypto API rather than Math.random, and the formatters parse in-page. That is a security property, not a marketing line, and it is the same in the free version — the license removes the ads.
What the twenty-three cover
Formatting and validation for JSON, CSS, SQL, XML and YAML; encoding and decoding for Base64, URLs, HTML entities, and JWTs; hashing and password generation; a regex tester with match highlighting; a Markdown previewer; diff and text utilities; Unix timestamp conversion; and design helpers for gradients, box shadows, and chmod permission bits.
They are deliberately single-purpose. A formatter that also lints, minifies, converts, and diffs ends up with a settings panel bigger than the input box. Each tool here loads in a second and does the one thing its URL says.
Questions people ask before buying
Is the desktop app available now?
Not yet. Buying now includes it at no extra cost when it ships. Today the license buys ad-free access across every tool on dev.logicapplabs.com.
Are generated passwords safe to use?
They come from crypto.getRandomValues, the browser's CSPRNG, and are never transmitted or logged. That said, for anything important, generate inside your password manager so the secret is stored the moment it exists.
Does the JWT decoder verify signatures?
It decodes and displays the header and claims, which is what you need when debugging an auth flow. Verification requires your signing key and belongs on your server, not in a browser tab.
Questions this page did not answer? Use the contact form — it reaches the person who wrote the software. Licensing terms are in the End-User License Agreement.