146 free tools · no signup · runs in your browser
Free Online Developer Tools
Decode JWTs, merge PDFs, convert images, test regex, generate UUIDs, and more — all in your browser. Free, no install.
Tip: press ⌘K or Ctrl+K anytime to search tools
Why DevBench
Private on your device
Nothing is uploaded to our servers. What you paste stays in your browser.
Ready when you are
No account, no queue. Pick a tool and use it in one click.
146+ tools in one place
From JSON and PDFs to money, health, and date helpers — free forever.
Frequently asked questions
- What is DevBench?
- DevBench is a free collection of 146+ online developer tools — JSON formatter, JWT debugger, Base64 encoder/decoder, regex tester, PDF merger, UUID generator, password generator, EMI calculator, and more. Everything runs directly in your browser with no account required.
- Is DevBench completely free?
- Yes. All tools on DevBench are free to use, forever. There are no paywalls, usage limits, or premium tiers. Hosting is supported by non-intrusive ads — see our Privacy policy for details.
- Does DevBench store or upload my data?
- Almost everything runs client-side in your browser — JSON, JWTs, passwords, most PDFs, and similar inputs never leave your device, and we do not store them. A few features need the network by design: API Tester and Webhook Simulator (via our CORS proxy), Notebook → PDF conversion, and the Go playground (which forwards code to go.dev). We do not keep those payloads after the response.
- Do I need to create an account?
- No signup, no email, no account. Open a tool and use it immediately — your last input is auto-saved in your browser's local storage so it's still there when you come back.
- What kinds of developer tools does DevBench include?
- DevBench covers JSON formatting and diffing, JWT debugging, Base64 and URL encoding, regex testing, UUID/ULID generation, hash generation (SHA-256, SHA-512), AES-256 encryption, PDF merging and splitting, text diffing, cron expression parsing, Unix timestamp conversion, QR code generation, finance calculators (EMI, GST, compound interest), health calculators (BMI, BMR), and much more.
- Can I use DevBench offline?
- Yes. DevBench is a Progressive Web App (PWA). After your first visit the app is cached by a service worker, so tools continue to work without an internet connection. You can also install it to your home screen or desktop for instant access.