Free developer tools
Small tools for everyday developer jobs: JSON, API cost estimates, page meta tags and code screenshots. They run in your browser, so pasted code and data stay on your device.
- Website meta tags generatorWrite your title, description and share-card tags, preview them, copy the HTML.Runs in your browser
- JSON formatter and validatorPaste or open JSON to format, minify, validate and explore it as a tree.Runs in your browser
- AI API cost calculator (OpenAI, Claude, Gemini)Estimate what your tokens cost per request, per day and per month, and compare models.Runs in your browser
- Code to image (beautiful code screenshots)Turn a code snippet into a clean, shareable PNG with a window frame and colours you pick.Runs in your browser
Questions
Is the code or data I paste uploaded?
Tools marked "Runs in your browser" work on your device, so nothing you enter is uploaded.
Are these tools free?
Yes, with no sign-up.
Can I use the output in my project?
Yes. What you generate is yours.