About PDF One
PDF One is a free PDF editor that works entirely on your device. It is made by Biosystems One Inc.
Why we built PDF One
We kept running into the same problem: to merge two PDFs or sign a form, the quickest option was a website that asked us to upload the document. Those documents were leases, tax forms and medical letters, exactly the files we least wanted on a stranger's server. Modern browsers are powerful enough to do all of this work locally, so we built an editor that does.
What PDF One does
- Organize pages: reorder, rotate, delete, extract and split, and merge several PDFs into one.
- Scan paper documents with a camera, with perspective correction and clean black-and-white output.
- Recognize and edit text, including on scanned pages, with OCR that runs on your device.
- Draw, highlight and erase on pages.
- Fill in forms and add your signature, dates, checkmarks and images.
- Save the finished PDF, or a page as an image, straight to your device.
How it stays free
PDF One is free to use on the web. It is supported by a small number of ads shown in the editor. Ads load in a sealed, sandboxed frame that cannot read the page or your documents, and you can choose non-personalized ads. The home page and these guides have no ads. An iPhone app is also available with an optional Pro upgrade.
Who we are
PDF One is developed and operated by Biosystems One Inc., a small software company. We design, build and support the app ourselves. Our privacy policy and terms explain exactly what we do and do not collect.
Contact
Questions, bug reports, feature ideas and privacy requests are welcome. Email us at [email protected] and we usually answer within two business days. Please never email us a confidential document; describe the problem instead, or send a sample file with nothing private in it.