Gaja Raju

Why I built PDFFlow

I am a developer based in Hyderabad who works with documents every day — client contracts, project proposals, invoices, technical reports. For years, every simple PDF task meant the same frustrating choice: pay Adobe's $239 per year subscription for Acrobat Pro, or use a free online tool that either uploaded my client's confidential files to a server I couldn't verify, added watermarks to the output, or hit me with a daily usage limit right when I needed to get something done.

What bothered me most wasn't the price. It was the upload. I was handling legal documents, signed agreements, financial summaries for clients. When a tool uploads those files to process them, you're trusting an entire infrastructure chain — the provider's servers, their employee access policies, their security practices, their government data obligations — with documents that aren't yours to share.

I knew from my development work that none of these operations actually need a server. Modern browsers can run the pdf-lib JavaScript library locally. Web Workers can handle heavy processing without blocking the page. The technology existed. Nobody had built a complete, polished PDF toolkit that used it properly.

How PDFFlow started

I started building PDFFlow in late 2023 as a side project. The first version was minimal — three tools, plain HTML, no design system. I shared it with some developer communities to get honest feedback. The response validated the idea: people had exactly the same frustrations I had, and a genuinely free, no-watermark, no-upload tool was something they actually wanted.

I rebuilt it in Next.js and expanded incrementally — adding tools as I personally hit use cases that needed them. Delete PDF pages (needed constantly for cleaning up scanned documents). Organize PDF pages (needed for reordering multi-section reports). JPG to PDF (needed for submitting ID documents sent as phone photos). Every tool on the site exists because I actually needed it.

Today PDFFlow has 16 fully functional browser-based tools and 22 pages covering all the major PDF workflows people encounter. I run it alone from Hyderabad — writing code, fixing bugs, writing documentation, reading and answering all support emails personally.

My background

I build web applications professionally. My primary stack is JavaScript, React, Next.js, and Node.js. I have worked on client projects across e-commerce, business productivity tools, and SaaS applications. PDFFlow is my first consumer-facing product — previous work was all client work that shipped under other names.

The specific technical challenge of PDFFlow — making complex document processing work reliably in a browser environment across different PDF structures, device types, and file sizes — has been the most technically interesting problem I have worked on. Every PDF is technically different. Edge cases are constant. Getting pdf-lib and pdf.js to handle real-world documents reliably across thousands of different file structures is genuinely hard work.

What matters most to me about PDFFlow

Two things: that the tools actually work correctly on real-world documents, and that the privacy architecture is genuine rather than performative. A PDF compressor that silently corrupts the output is worse than no compressor at all. A tool that claims "your files stay private" while uploading them to AWS S3 is worse than a tool that honestly discloses its processing model.

Both of these things require ongoing attention. Real-world PDFs are generated by hundreds of different applications and have widely varying internal structures. I regularly receive bug reports about PDFs that don't process correctly — specific files created by specific software versions with unusual object structures. I fix these. The local processing architecture is maintained by design: every new tool I add uses the same client-side processing approach as the original three tools.

If you use PDFFlow and something doesn't work as expected — or if there is a tool you need that isn't here — write to me directly. I read everything.