I Built 65 Free Dev Tools That Run 100% in Your Browser — No Signup, No Server

Antonio Venancio — Wed, 12 Aug 2026 19:12:02 +0000

I Built 65 Free Dev Tools That Run 100% in Your Browser — No Signup, No Ads, No Server

A few months ago I caught myself doing the same annoying thing for the tenth time: opening a new tab, typing "json formatter" into Google, clicking through an ad-heavy result, pasting in an API response just to read it, and closing the tab five seconds later. Then doing the same thing an hour later for a UUID. Then a regex. Then decoding a JWT I probably shouldn't have been pasting into a random site in the first place.

That last one is what actually bothered me. I was about to paste a token from a staging environment into a tool with no idea where that data was going. Nothing bad happened, but it made me realize how casually I'd been trusting random sites with things that mattered.

So I built Orikony: a set of 65 free tools that cover the stuff I (and probably you) reach for constantly — formatting, validation, generation, conversion — and made sure every single one that can run entirely in the browser does exactly that. No upload, no account, no ads in the way of the thing you actually came to do.

What's actually in it

Developer tools (the biggest category, 33 of them): JSON formatter/validator, UUID generator, Base64 encode/decode, JWT decoder, regex tester with plain-English pattern explanations, hash generator, SQL/HTML/CSS/XML formatters, cron expression builder, color tools, and a handful of niche ones like cURL-to-code conversion.

AI tools (new, and honestly the ones I'm most excited about): a token counter that compares cost across GPT-4o, Claude 3.5, and Gemini 1.5 side by side, a structured prompt builder, and a system-prompt builder that outputs proper XML-tagged instructions.

Everything else: calculators (BMI, GPA, mortgage, compound interest), converters (units, time zones, measurements), PDF tools (merge, split, extract text, edit metadata), image tools (WebP conversion, SVG optimization), a password generator, and a few odds and ends like a QR code generator and a typing speed test.

Two things I actually cared about getting right

Privacy isn't just a checkbox. Anywhere the tool can run in the browser, it does. Your JSON, your JWT, your regex test string — none of it touches a server. You can open dev tools and watch the network tab to confirm that yourself, which I'd genuinely encourage doing before trusting any tool like this, mine included.

"Free tool" doesn't have to mean "bare minimum." A few examples of where I went further than the obvious version:

The UUID generator isn't just "click button, get UUID." It generates in batch, supports v4/v7/NIL, outputs in six formats (including C# braces and SQL literals), and has a full Inspector mode that decodes any UUID you paste and shows its version, variant, and embedded timestamp.
The regex tester explains each part of your pattern in plain English as you type, on top of the usual live match highlighting — I still don't have most regex syntax memorized, so this is as much for me as anyone.
The password generator has a passphrase mode (word-based, still cryptographically random via the Web Crypto API) for the cases where you actually have to type the thing by hand, not just paste it into a manager.
What's next

I'm treating this as an ongoing project, not a one-time launch. Next up is probably expanding the AI tools category, since that's the newest and least-covered corner of the catalog, plus adding SVG export to the QR generator (currently PNG-only, which bugs me every time someone needs to print one large).

If you try something and it's rough, annoying, or missing an obvious feature, I'd genuinely like to hear about it — that feedback loop is most of how the developer tools got as detailed as they are now.

Try https://orikony.nikaotech.com/

I Got Tired of 10 Browser Tabs for Basic Dev Tasks, So I Built One Site With All of Them

Antonio Venancio — Wed, 12 Aug 2026 19:07:03 +0000

I built https://orikony.nikaotech.com/ because I was tired of bouncing between a dozen different sites for basic dev/utility tasks — formatting JSON here, generating a UUID there, checking a regex somewhere else, each one with different ads and different UX.

Orikony is 65+ free tools (developer utilities, calculators, converters, PDF tools, and a few AI-focused ones like a token cost estimator) that all run client-side in your browser — no signup, no server upload, no ads getting in the way.

A few I'm most proud of: the UUID generator has a full Inspector that decodes any UUID you paste (version, variant, timestamp), and the regex tester explains each part of your pattern in plain English instead of just showing match/no-match.

Would love feedback on what's missing, what feels rough, or what tool you'd want added next.

DEV Community: Antonio Venancio

I Built 65 Free Dev Tools That Run 100% in Your Browser — No Signup, No Server

I Got Tired of 10 Browser Tabs for Basic Dev Tasks, So I Built One Site With All of Them