Optimax PDF home
Private by design: browser tools never upload your file

Free online PDF tools

Merge, split, compress and convert PDF files. Free, with no sign up.

Server tools delete your file after processing.

16 tools

Six tools to start with. The full set of 16 is below.

All PDF tools

Every tool opens on its own page and shows its file size limit before you add a file.

Organize

3 tools

Optimize

2 tools

Convert to PDF

4 tools

Convert from PDF

3 tools

Edit and sign

2 tools

Security

2 tools

How it works

  1. Step 1: Pick a tool

    Choose a tool above or search for it. Each tool page says where your file is processed and how large it can be.

  2. Step 2: Add your file

    Drop the file on the page, paste it, or use the select button. The type and the size are checked before anything else happens.

  3. Step 3: Download your result

    Browser tools finish on your device. Server tools send the file back when it is ready. The download starts on its own.

Where your files are processed

Some tools run on your device and some run on our server. Every tool page carries the same badge you see here, so you know before you add a file.

Runs in your browser

Merge, Split, Rotate, Sign, Watermark, JPG to PDF and PDF to JPG process your file on your device. It is not uploaded. They do use the network once, to load the code they run.

Processed on our server

Compress, OCR, PDF to Excel, Protect, Unlock and the Office conversions send your file over an encrypted connection. It is deleted right after your result is sent. We do not keep copies. PDF to Word lets you choose between the two.

  • Free to use. No sign up.
  • We do not add watermarks to your files.
  • We do not sell or share your files.
  • Nothing to install, and nothing to sign in to.

What we collect, and what we do not, is set out in our Privacy Policy.

When to use Optimax PDF

Four jobs these tools handle every day.

  • A file too large to email. Compress PDF makes the file smaller by compressing the images inside it, which is usually enough for an email or an upload form.

  • A scan you cannot search. OCR PDF adds a text layer to a scanned document, so you can search it and copy text out of it.

  • A PDF you need to edit. PDF to Word turns the file into a document you can open in Word and change.

  • Photos of paperwork. JPG to PDF puts pictures from your phone into one PDF, in the order you choose.

Limits worth knowing

All of it is true today. Better to read it here than find out after an upload.

  • File size. Server tools accept 10 MB for OCR, 15 MB for PDF to Word, 20 MB for the Office conversions, 30 MB for Protect and Unlock, and 50 MB for Compress.

  • Page counts. OCR stops at 50 pages, PDF to Word at 150, and PDF to Excel with OCR at 50, so a long file answers quickly instead of running out of time.

  • The first file can be slow. Our server sleeps when nobody is using it. Waking it up can take up to a minute, and the page says so while it waits.

  • Fair use. Browser tools have no task limit. Server tools allow 30 jobs in 10 minutes for each visitor, which keeps the free server available.

  • Large files on phones. Browser tools do the work inside the tab, so a very large file can be slow or run out of memory on a phone.

Frequently asked questions

Are these online PDF tools safe to use?
Seven of them run on your device, so the file is never uploaded. The tools that do upload send your file over an encrypted connection and delete it right after your result is sent. We do not keep copies.
Is Optimax PDF free, and are there daily limits?
Yes, every tool is free and there is no sign up. Browser tools have no task limit. Server tools allow 30 jobs in 10 minutes for each visitor, which keeps the free server available for everyone.
Do I need an account or any software?
No. There is no account, no email address and nothing to install. Open a tool page, add your file, and download the result.
How do I know which tools upload my file?
Every tool card and every tool page carries a badge. Runs in your browser means the file stays on your device. Processed on our server means it is uploaded and then deleted. Browser or server means you choose, which today applies to PDF to Word.
Is there a file size limit?
Server tools have one, shown on the tool page before you add a file. It runs from 10 MB for OCR up to 50 MB for Compress. Browser tools have no set limit, although a very large file can be slow on a phone.
Does it work on iPhone, Android, Mac and Windows?
Yes. Everything runs in a current browser such as Chrome, Safari, Edge or Firefox, on a phone, a tablet or a computer. There is no app and no extension to add.