45+ tools to merge, split, compress, convert, and edit PDFs. Your files never leave your device — 100% private, unlimited use, no watermarks, no sign-up.
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PDFiX is a free collection of 28 PDF tools that run entirely in your browser. Unlike most online PDF services, your files are never uploaded to a server — all processing happens locally on your device using JavaScript and the pdf-lib library. This means three things: your documents stay 100% private, you can use the tools without an internet connection after the page loads, and there's no file size limit beyond what your browser can handle.
Most free PDF websites upload your file to their server, process it there, and send it back. That works fine for non-sensitive documents, but it creates real risks for tax forms, contracts, ID scans, medical records, or anything confidential. With PDFiX, the file never leaves your computer. There's nothing to leak, breach, or accidentally store.
Yes — all 28 tools are completely free with no limits on file count, file size, or daily usage. We don't charge anything because the processing happens on your device, not on our servers. We support the site through ads and affiliate partnerships.
No. All processing happens in your browser using JavaScript. Your files never touch our servers. You can verify this by disconnecting your internet after the page loads — the tools still work.
There's no fixed limit. Since processing is local, the only constraint is your device's RAM. Most modern computers handle 100MB+ PDFs without issues. Very large files (500MB+) may slow down older devices.
No — browser-based compression re-rasterizes pages as images, which reduces size but makes text non-selectable. For lossless professional compression, we recommend Adobe Acrobat Pro. PDFiX is best for quick everyday compression.
Browser libraries can't do industry-standard AES-256 encryption. PDFiX adds a protection marker but for genuine encryption (legal documents, sensitive data), please use Adobe Acrobat or another desktop application.
Yes, once the page loads. You can save it as an HTML file or use it as a Progressive Web App. All processing libraries are loaded into your browser, so the tools keep working without internet.
Those services upload your files and process them server-side, which can be faster for huge files but requires trust. PDFiX is privacy-first: slower for massive files but guarantees nothing leaves your device. For sensitive documents, browser-based is the safer choice.