The latest articles on DEV Community by nikunj (@nikunj_r88). https://dev.to/nikunj_r88 https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F4048876%2F7b43b5cb-380a-4e35-853e-1edd1126d255.png https://dev.to/nikunj_r88 en nikunj Wed, 19 Aug 2026 17:04:46 +0000 https://dev.to/nikunj_r88/why-does-a-free-pdf-tool-need-your-file-to-touch-a-server-at-all-17i1 https://dev.to/nikunj_r88/why-does-a-free-pdf-tool-need-your-file-to-touch-a-server-at-all-17i1 <h1> Why does a "free PDF tool" need your file to touch a server at all? </h1> <p>Most people don't think twice before uploading a PDF online. Resume, offer<br> letter, signed contract, ID scan — search "compress PDF," click the first<br> result, upload, done.</p> <p>Here's what never sat right with me: <strong>almost none of these tools tell you<br> where that file actually goes.</strong> Not how long it's stored. Not who can access<br> it internally. Not whether "we delete it after processing" is enforced by<br> policy or by code.</p> <h2> The part that's easy to miss </h2> <p>The client-side approach isn't new — there's a growing list of tools now<br> doing PDF processing entirely in the browser via WebAssembly, and that's<br> genuinely good for everyone. More privacy-respecting options is a win.</p> <p>But "runs in the browser" isn't the whole story. The harder part is whether<br> the tool actually gets the PDF spec right once you're not relying on a<br> mature server-side library to paper over the edge cases.</p> <p>Two examples from building <a href="https://onepagepdfconverter.com" rel="noopener noreferrer">One Page PDF Converter</a>:</p> <p><strong>Password encoding.</strong> The PDF spec has a specific encoding requirement<br> (PDFDocEncoding) for passwords with non-ASCII characters — accents, symbols.<br> Get it wrong and the file <em>looks</em> protected, opens fine today, and then<br> silently won't unlock in six months when you actually need it. This is an<br> easy bug to ship and a nasty one to discover.</p> <p><strong>Encryption format support.</strong> PDFs can be encrypted with either RC4 (older,<br> still common in files from older software) or AES (current standard). A lot<br> of browser-based tools only handle one and fail silently on the other.</p> <p>Neither of these is hard to get right. They're just easy to skip when you're<br> optimizing for "ships fast" over "handles the file someone hands you in five<br> years."</p> <h2> What we ended up building </h2> <ul> <li>Every tool (merge, split, compress, sign, convert, protect) runs 100% client-side — verifiable by literally checking the network tab</li> <li>Correct password encoding and dual AES/RC4 support, tested against real encrypted files, not just the happy path</li> <li>Pay-per-use pricing (₹9.99 / $0.12 per credit) instead of a subscription — most people need this for ten minutes a month, not every day</li> </ul> <p>Free to try: [<a href="https://onepagepdfconverter.com" rel="noopener noreferrer">onepagepdfconverter.com</a><br> ](url)<br> Curious what other PDF spec edge cases people have run into — always<br> interesting to compare notes with anyone else who's gone down this path.</p> ai webdev productivity beginners nikunj Mon, 27 Jul 2026 06:43:10 +0000 https://dev.to/nikunj_r88/a-pdf-toolkit-that-never-uploads-your-files-now-with-batch-mode-4jn2 https://dev.to/nikunj_r88/a-pdf-toolkit-that-never-uploads-your-files-now-with-batch-mode-4jn2 <div class="crayons-card c-embed text-styles text-styles--secondary"> <div class="c-embed__content"> <div class="c-embed__cover"> <a href="https://onepagepdfconverter.com/" class="c-link align-middle" rel="noopener noreferrer"> <img alt="" src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fonepagepdfconverter.com%2Fog-image.png" height="420" class="m-0" width="800"> </a> </div> <div class="c-embed__body"> <h2 class="fs-xl lh-tight"> <a href="https://onepagepdfconverter.com/" rel="noopener noreferrer" class="c-link"> Free Online PDF Converter – Word, HTML, Image &amp; More Tools </a> </h2> <p class="truncate-at-3"> Free online PDF converter with complete privacy protection. Merge, split, compress, sign, and convert PDFs directly in your browser — plus a free age calculator and scientific calculator. No uploads, no data storage. </p> <div class="color-secondary fs-s flex items-center"> <img alt="favicon" class="c-embed__favicon m-0 mr-2 radius-0" src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fonepagepdfconverter.com%2Ffavicon.ico" width="48" height="48"> onepagepdfconverter.com </div> </div> </div> </div> <br> I built One Page PDF Converter (onepagepdfconverter.com) — a set of 20+ PDF tools (merge, split, compress, sign, convert to/from Word/Excel/PowerPoint/images, etc.) plus a couple of everyday calculators, all running entirely client-side in the browser. There's no backend processing your files: no upload, no storage, no server round-trip. Everything happens locally via JS, so your documents never leave your device. That's the whole pitch — it's the same reason I built it, since most PDF tools online quietly funnel your files through a server you have no visibility into. <p>All 20+ tools are free with no sign-up.</p> <p>Today I'm adding a small premium option: batch processing, for ₹9.99 per batch (~$0.10 USD), one-time — no subscription. Run a tool across multiple files in one go instead of one at a time. Everything else on the site stays free and unlimited.</p> <p>Tech-wise it's a single HTML file backed by client-side JS libraries — no framework, no build step. It's a PWA, so it installs and works offline once loaded.</p> <p>Would love feedback — especially on the privacy angle, the batch pricing, or tools you think are missing.</p> <div class="crayons-card c-embed text-styles text-styles--secondary"> <div class="c-embed__content"> <div class="c-embed__cover"> <a href="https://onepagepdfconverter.com/" class="c-link align-middle" rel="noopener noreferrer"> <img alt="" src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fonepagepdfconverter.com%2Fog-image.png" height="420" class="m-0" width="800"> </a> </div> <div class="c-embed__body"> <h2 class="fs-xl lh-tight"> <a href="https://onepagepdfconverter.com/" rel="noopener noreferrer" class="c-link"> Free Online PDF Converter – Word, HTML, Image &amp; More Tools </a> </h2> <p class="truncate-at-3"> Free online PDF converter with complete privacy protection. Merge, split, compress, sign, and convert PDFs directly in your browser — plus a free age calculator and scientific calculator. No uploads, no data storage. </p> <div class="color-secondary fs-s flex items-center"> <img alt="favicon" class="c-embed__favicon m-0 mr-2 radius-0" src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fonepagepdfconverter.com%2Ffavicon.ico" width="48" height="48"> onepagepdfconverter.com </div> </div> </div> </div> webdev productivity security news