# files.co > Free PDF tools that run 100% in the browser via WebAssembly. Files never leave the device — no uploads, no servers, no accounts. Privacy is the architecture, not a policy; verifiable in DevTools → Network. ## Tools - [Merge PDF files](https://files.co/merge-pdf/): Combine multiple PDFs into one. Free, private, in your browser. - [Split PDF](https://files.co/split-pdf/): Extract pages from your PDF into separate files. - [Compress PDF](https://files.co/compress-pdf/): Reduce PDF file size with control over quality. - [Rotate PDF pages](https://files.co/rotate-pdf/): Rotate any page to the right orientation. - [Reorder pages](https://files.co/reorder-pdf/): Drag and drop to reorder pages of your PDF. - [Sign PDF](https://files.co/sign-pdf/): Add your handwritten signature. Visual signature only — for qualified eIDAS signatures use Reader Desktop. - [Add watermark to PDF](https://files.co/watermark-pdf/): Stamp text or image watermarks on your PDF. - [Protect PDF with password](https://files.co/protect-pdf/): Encrypt your PDF with AES-128. - [Convert images to PDF](https://files.co/images-to-pdf/): Combine JPG, PNG, WebP into a single PDF. - [Convert PDF to images](https://files.co/pdf-to-images/): Export each page of your PDF as PNG, JPG or WebP. - [OCR PDF — extract text](https://files.co/ocr-pdf/): Extract searchable text from scanned PDFs. Runs locally with Tesseract. - [Extract text from PDF](https://files.co/extract-text-pdf/): Get plain text from native PDFs (with embedded text). For scanned PDFs use OCR. - [Add page numbers to PDF](https://files.co/page-numbers-pdf/): Stamp page numbers on every page. Custom format, position and start number. - [Unlock PDF — remove password](https://files.co/unlock-pdf/): Remove the password from a PDF you can already open. We never receive the password — runs locally. - [Crop PDF pages](https://files.co/crop-pdf/): Trim white margins from every page. Same content, smaller crop area. - [Add header & footer to PDF](https://files.co/header-footer-pdf/): Stamp custom text in the header and/or footer of every page. - [Compare PDFs](https://files.co/compare-pdf/): Diff two PDFs side by side. Spots additions and removals in the text. - [Edit PDF bookmarks](https://files.co/bookmarks-pdf/): Add, edit and remove the table of contents (outline) of your PDF. - [Fill PDF forms](https://files.co/fill-pdf/): Detect AcroForm fields and fill them in your browser. Text, checkboxes, radio, dropdowns. - [Convert PDF to PDF/A](https://files.co/pdf-to-pdfa/): Make any PDF archive-ready (ISO 19005-2). Embeds the sRGB color profile and PDF/A-2b metadata required for long-term preservation. - [Convert images](https://files.co/image-convert/): Convert between JPG, PNG, WebP and SVG images — right in your browser. - [PDF metadata viewer](https://files.co/pdf-metadata/): See what your PDF reveals about you — author, software, dates — and download a copy without it. - [Redact a PDF](https://files.co/redact-pdf/): Black out what should not be read — and actually remove it, not just cover it. - [Scan to PDF](https://files.co/scan-to-pdf/): Photograph a document with your phone and get a clean PDF — without any scanner app touching your files. - [Flatten PDF](https://files.co/flatten-pdf/): Fix form fields, signatures and annotations into the page so nobody can edit or delete them. - [Pages per sheet](https://files.co/pages-per-sheet/): Put 2, 4, 6 or 9 pages on each sheet — for printing handouts, drafts or anything you want on less paper. - [Split PDF by size](https://files.co/split-pdf-by-size/): Cut a PDF into parts that each stay under a size limit — for email attachments and upload forms that reject big files. - [Remove annotations](https://files.co/remove-annotations/): Strip comments, highlights, sticky notes and drawn marks — the review is over and the document should read clean. - [Resize PDF pages](https://files.co/resize-pdf-pages/): Change every page to A4, Letter or any size you need, with the content scaled to fit and centred. - [Overlay two PDFs](https://files.co/overlay-pdf/): Put one PDF on top of another — letterhead, a stamp, a signature page or a template over your document. - [Attach files to a PDF](https://files.co/attach-files-to-pdf/): Carry the source files inside the PDF itself — a spreadsheet, an invoice in XML, the raw data behind a report. - [Remove active content from a PDF](https://files.co/sanitize-pdf/): Strip the JavaScript, the actions that fire when the file opens and the automatic submissions. The pages stay exactly as they are. ## Learn - [Guide](https://files.co/guide/): How every tool works, step by step. - [Blog](https://files.co/blog/): Notes on PDFs, privacy, and standards. ## Desktop app - [Files.co PDF Suite](https://files.co/pdf-suite/): Native Mac and Windows app, 26 tools, offline. - [Pricing](https://files.co/pricing.md): Free tier and one-time Pro unlock, in plain text. ## Privacy - All processing happens locally in the browser (WebAssembly). No file is uploaded. - No account, no usage limits, works offline once loaded. - Protect uses AES-128 encryption. Analytics see page views, never document content. ## More - [Privacy policy](https://files.co/privacy/) - [Terms](https://files.co/terms/)