Indie Developer
Tiny tools that pull their weight,
so things stay simple.
I'm Seanhan. I make free, local-first, no-signup tools — each one starts from an itch I have, and I share what I build because someone else probably has the same itch.
Principles
Four rules every project sticks to.
Privacy first
Your files never leave the browser. No server storage, no cloud processing.
Affordable
Core features stay free, no signup, and never locked behind a paywall.
Just works
Drop a file in and go. Zero learning curve, works offline.
No data trail
Even the online tools don't persist what you send or use it to train anything.
Work
Tools built under those principles. Free to use.
ITBox 37+ tools
Daily-driver developer tools: JSON / XML / SQL formatters, Base64, hashes, JWT, regex, QR codes, cron, timestamps — all in one place.
Open itbox.seanhan.top →PDFBox 14 tools
Pure-frontend PDF toolkit: merge, split, compress, encrypt, OCR, watermark, page numbers… everything runs in the browser, zero upload, zero tracking.
Open pdfbox.seanhan.top →ImgBox 31 tools
Pure-frontend image toolkit: compress, convert, resize, crop, rotate, watermark, ID photos, social covers — all done in your browser.
Open imgbox.seanhan.top →More tools in the pipeline. Got an idea for one you'd actually use? Drop me a line.
Roadmap
What's shipped, what's in flight, and what's coming next.
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Shipped
ITBox
37+ developer tools: JSON / SQL / encoding / regex / QR codes and more.
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Shipped
PDFBox
14 pure-frontend PDF tools: merge, split, compress, encrypt, OCR, watermark…
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Shipped
ImgBox
31 pure-frontend image tools: compress, convert, crop, watermark, ID photos, AI background removal, social covers…
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In progress
More small tools
Polishing the next batch. Got a feature in mind? Tell me.
FAQ
Are these tools really free? Will you charge later?
Everything is free right now, no signup required. If server costs ever get out of hand I might add non-intrusive ads or optional sponsorship, but the line in the sand is: the core features won't get walled off. Nothing you rely on today will suddenly demand payment.
Do my files really stay off the server?
PDFBox and ITBox are pure-frontend tools — nothing gets sent to a server during processing. Open DevTools → Network and see for yourself.
Will there be tools that need a backend? What happens to my data?
Yes — some things (like AI features) genuinely need a server. The promise is simple: borrow the compute, keep the privacy. What you send is discarded after processing, never persisted, never used for training, never profiled, never sold. Tools that hit a backend will say so on the page.
Are the tools open source?
Not yet. The focus is shipping a polished product first; an open-source timeline comes once the core is stable and the docs are in place.
Do they work offline?
Most of the pure-frontend tools do. On your first visit the browser caches the scripts and fonts it needs, so later visits work without a connection (PWA mode).
Why build these?
Each one started as my own itch — finding an online tool is annoying, uploading private files is sketchy, paywalls are everywhere. I ship what I build because chances are someone else hits the same wall.