Every time I need to do something simple — format JSON, flip a coin, calculate a tip, compress an image — I end up on some sketchy site that wants me to create an account, watch an ad, or "upgrade to pro" for basic features.
So I built Utilko.
It's a collection of 250+ free online tools that work instantly in your browser. No signup. No paywall. No data collection. Everything runs client-side — your data never leaves your device.
Here's what's inside:
🔧 Developer Tools (30 tools)
JSON formatter, Base64 encoder, regex tester, UUID generator, JWT decoder, diff checker, hash generator, and more. If you write code, these will save you hours.
→ Try the JSON Formatter: https://utilko.com/developer-tools/json-formatter/
📝 Text Tools (30 tools)
Word counter, password generator, case converter, fancy text generator, Lorem Ipsum generator, and more.
→ Try the Password Generator: https://utilko.com/text-tools/password-generator/
🔢 Calculators (40 tools)
Percentage calculator, mortgage calculator, BMI calculator, tip calculator, compound interest calculator, salary calculator, calorie calculator, and more.
→ Try the Percentage Calculator: https://utilko.com/calculators/percentage-calculator/
🔄 Converters (20 tools)
Unit converter, temperature, weight, CSV to JSON, YAML to JSON, currency converter, Roman numerals, and more.
→ Try the Temperature Converter: https://utilko.com/converters/temperature-converter/
🖼️ Image Tools (15 tools)
Image compressor, resizer, PNG to JPG, color picker, meme generator, image cropper, and more. All processing happens in your browser using the Canvas API.
→ Try the Image Compressor: https://utilko.com/image-tools/image-compressor/
🎮 Fun & Games (20 tools)
Coin flip, dice roller, spin the wheel, magic 8 ball, trivia, rock paper scissors, bingo card generator, and more. Great for settling arguments.
→ Try the Spin the Wheel: https://utilko.com/games-random-tools/spin-the-wheel/
📱 Social Media Tools (25 tools)
Instagram font generator, hashtag generator, Twitter thread maker, YouTube thumbnail downloader, emoji keyboard, and more.
→ Try the Instagram Font Generator: https://utilko.com/social-media-tools/instagram-font-generator/
📄 PDF & Document Tools (15 tools)
Merge PDF, compress PDF, invoice generator, resume builder, receipt generator, and more.
→ Try the Invoice Generator: https://utilko.com/pdf-document-tools/invoice-generator/
Plus: SEO tools, privacy tools, writing tools, and more.
— — —
Why I Built This
I'm a developer, and I was frustrated by three things:
- Tools that require signup for no reason
- Tools that upload your data to their servers
- Tools that are slow because they're bloated with trackers
Utilko solves all three. It's built with Astro and deployed on Cloudflare's edge network, so it loads in milliseconds anywhere in the world. And since everything runs in your browser, your data stays on your device.
— — —
The Tech Stack (for nerds)
- Astro 5 (static HTML + React islands)
- Cloudflare Pages (edge deployment)
- Tailwind CSS 4
- Zero backend for 95% of tools
- 250+ React components, each under 200 lines
- Full build in ~5 seconds
— — —
What's Next?
I'm adding new tools every week based on user requests. If there's a tool you wish existed, let me know in the comments.
🔗 Check it out: https://utilko.com
Every tool is free. No signup. No limits. Bookmark it and use it whenever you need a quick tool.
— — —
Tags: Programming, Web Development, Productivity, Free Tools, JavaScript
Top comments (0)