Your files never leave your device

Every PDF job, done privately in your browser.

Combine, arrange, sign, shrink and lock PDFs and photos. No uploads, no sign-up, no watermark.

Open pdfSofo, it's free See the tools

pdfSofo: files on the left, pages in the middle, the final PDF on the right

Pick a job

Each one opens the same app, ready for that task. Mix and match: sign, then compress, then share.

Merge PDF filesPut several PDFs and photos together into one document, in exactly the order you want.Split a PDFCut one PDF into several, by page ranges, a fixed number of pages, or one file per page.Compress a PDFShrink big PDFs, usually scans and photos, and see exactly how each option looks before you save.Sign a PDFAdd your signature and initials, and fill in form fields, without printing or scanning.Organize PDF pagesRearrange pages across several files with drag and drop, and see the finished PDF as you go.JPG to PDFTurn photos of documents, receipts or scans into one tidy PDF.Password-protect a PDFLock a PDF so only people with the password can open it.Crop PDF pagesCut away margins or keep just part of a page or scan.Add text to a PDFWrite notes on pages, and add headers, footers and page numbers to the whole document.

Why your files stay with you

Most PDF websites upload your documents to their servers to process them. pdfSofo does the work inside your browser instead.

Nothing is uploaded

Contracts, bank statements and IDs are read and changed on your device. There is no server that ever sees them.

Works offline

Once opened, pdfSofo keeps working without internet. Install it like an app from your browser.

Originals untouched

Your files are only read. Every result is a new file, and you see exactly what it looks like before you save.

How it compares

The free plan isn't a trial: no daily limits, no watermarks.

	pdfSofo	Typical PDF websites
Files stay on your device	Yes	Uploaded to a server
Free daily limit	None	Often 1-3 tasks a day
Watermark on free files	Never	Sometimes
Preview before you download	Yes, at the size you choose	Rarely
Works offline	Yes	No

Guides

Short how-tos for the jobs people ask about most.

How to compress a PDF for emailPDF too big to email? Shrink it below your email's attachment limit in your browser, see the quality before…How to make a PDF smaller to send on WhatsAppSend big PDFs on WhatsApp faster: shrink them on your phone or computer in the browser, check the quality,…How to get a PDF under 1 MBForms and job portals often require PDFs under 1 MB. See the exact size of each option before you save, and…How to reduce PDF size without losing qualityMake a PDF smaller with no visible quality loss: remove waste first, then shrink only the pictures, with a…How to merge PDFs on iPhoneCombine PDFs and photos into one PDF on your iPhone, right in Safari. No app to install, no upload, and you…How to merge PDFs on a MacTwo easy ways to combine PDFs on a Mac: with Preview, or with pdfSofo in your browser when you also want to…

Questions

Is pdfSofo really free?

Yes. Combining, arranging, splitting and compressing are free with no limits. A Pro plan with extra tools is planned; the free tools stay free.

How can it work without uploading?

Modern browsers can run full PDF software. pdfSofo downloads the app once, then all the work happens on your computer or phone.

Does it work on my phone?

Yes, in any modern phone browser. Share sends the finished PDF straight to WhatsApp, Mail or anything else.