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Code Tools

JSON Formatter

Format, validate and minify JSON data

Regex Tester

Test regular expressions in real-time

Code to Image

Beautiful code screenshots for sharing

Generators

CSS Generator

Box-shadow & gradient builder with live preview

README Generator

Build GitHub README files with ease

Freelance Calculator

Calculate hourly rate for freelancers

Image Tools

Gemini Watermark Remover

Remove Gemini & Nano Banana watermarks

Articles & Guides

Articles

Tutorials, tips & insights

Free Developer Tools

Boost your workflow with our collection of free, open-source developer utilities.

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Free developer tools

Nattang's free developer tools are seven small utilities: format and validate JSON, test regular expressions, turn code into images, build CSS shadows and gradients, write a README, price freelance work, and remove the Gemini watermark from images. No sign-up. Six run entirely in your browser; the watermark remover deletes uploads after 2 hours.

  • Free
  • No sign-up
  • Runs in your browser

Code tools

  • JSON Formatter & Validator

    Format, validate, and minify JSON with auto-fix, tree view, key sorting, and file upload/download. Runs entirely in the browser.

    Open tool

  • Regex Tester & Debugger

    Test JavaScript regular expressions in real time with match highlighting, capture groups, replace mode, and a plain-English pattern explanation.

    Open tool

  • Code to Image

    Turn code snippets into shareable images with syntax highlighting, themes, window chrome, and PNG/SVG export.

    Open tool

Generators

  • CSS Box-Shadow & Gradient Generator

    Build multi-layer box-shadows and linear/radial/conic gradients with a live preview and copy-ready CSS.

    Open tool

  • README.md Generator

    Assemble a GitHub README from toggleable sections, badges, and a tech stack picker, with live markdown preview.

    Open tool

Image tools

  • Gemini Watermark Remover

    Remove the Gemini sparkle watermark from AI-generated images using pixel-accurate reverse alpha blending. PNG, JPEG, and WebP.

    Open tool

Calculators

  • Freelance Hourly Rate Calculator

    Work out a sustainable hourly, daily, and monthly freelance rate from expenses, profit margin, tax, and savings.

    Open tool
NattangNattang

Beautifully crafted digital products and free tools. Built in Thailand, made for creators worldwide.

FAQ

How do I get my files? After purchase, download links are sent to your email instantly.

Can I get a refund? Due to the digital nature of our products, all sales are final.

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