29 tools, free

PDF tools

Merge, split, reorder and compress PDFs; sign them, fill in forms, redact private details or compare two versions; and turn pages into images, text or Markdown. Every tool runs inside your browser, so your documents are never uploaded.

Which tool do I need?

Start from what you want to do. These are the most common PDF jobs and the tool that does each one best.

Combine several PDFs into oneEach file stays whole, in the order you set. Merge up to five at a time.Merge PDF
Reorder, turn or remove pagesAll three on one screen with page thumbnails, so you can see what you change.Organize PDF
Send only part of a documentOne file per page range. To keep a few chosen pages in one file, use Extract PDF pages.Split PDF
Make a PDF smaller for email or an upload formShrinks the photos and scans inside. Text-only PDFs are usually small already.Compress PDF
Sign a documentDraw or type your signature and place it. It is a picture of a signature, not a certificate.Sign PDF
Fill in a formFor PDFs with real fill-in fields. For a scanned form, type over it with Edit PDF.PDF forms
Hide private details before sharingCovered content is removed from the file. A white box in Edit PDF only hides it from view.Redact PDF
Get the text out of a PDFPlain text, page by page. PDF to Markdown keeps headings and lists. Scans have no text.PDF to text
See what changed between two versionsLines removed and added, with the changed words marked. Text only, not pictures.Compare PDF
Add or remove a passwordProtect PDF adds one. To remove a password you know, use Unlock PDF.Protect PDF

How browser-native PDF processing protects your documents

Client-side PDF manipulation without remote uploads

PDF files typically contain high-stakes personal, legal, or commercial information: signed contracts, tax filings, medical reports, and bank statements. Most online converters require uploading entire documents to a remote cloud server, creating data privacy risks.

FileConvertify uses modern WebAssembly and JavaScript engines (including pdf-lib, @cantoo/pdf-lib, and Mozilla's pdf.js) to read, modify, and generate PDF documents directly inside your browser tab. Document catalog trees, vector content streams, and embedded font dictionaries are handled entirely on your device.

Vector fidelity preserved

Operations like merging, splitting, and page reordering copy PDF object streams byte-for-byte rather than rasterizing pages into blurry images, keeping text sharp and selectable.

On-device encryption & signing

Protect PDF applies AES-256 encryption client-side, and Sign PDF embeds signatures as transparent overlays without sending passwords or signatures to any server.

Browser memory management

Large multi-page documents are parsed efficiently using typed array buffers, allowing you to manipulate hefty files without exceeding browser memory limits.

Guides

Common questions

Frequently asked questions

Answers about privacy, browser execution limits, and format compatibility for our pdf tools.

Are my PDF files uploaded to an online server?

No. Your PDF files are read into local browser memory using JavaScript and WebAssembly. Processing happens on your device and files are never sent over the internet.

Will merging or splitting PDFs reduce print quality?

No. Tools like Merge PDF and Split PDF copy the underlying PDF page dictionaries and vector streams directly without re-compression, preserving original image resolution and vector typography.

Can I edit or compress password-protected PDFs?

Protected PDFs must be unlocked with Unlock PDF first by supplying the owner password, because encrypted content streams cannot be modified without decryption.

Why does Compress PDF make some documents much smaller but others barely change?

Compression primarily scales down high-resolution embedded photos and scans. Documents that consist almost entirely of text and vector lines are already compact and will not shrink significantly.