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Edit a scanned PDF
A scan is a picture of a page. OasisPDF reads its words on your device, so you can find and copy them, and sets the words you change again in a font that matches the scan.
Why the limit? The editor works on your file on your own device, with nothing uploaded. That takes browser features only recent desktop versions of Chrome and Edge have.
or drop one anywhere on this page
Your file stays on this device. Nothing is uploaded.
Recognize the text
One click reads a page or the whole document. The words are added to the file as text that lies over the picture, where every PDF reader finds it.
Change the words
Double-click scanned words to edit them. The old ink is covered with the color of the paper and the words are set again in the closest font, at the size and weight measured in the scan.
On your device
The reader is downloaded once (4 to 8 MB, depending on the language) the first time you ask for it. A page that is a picture with words in it, such as a slide, needs a second helper that finds its lines of text (20 MB, once). After that both work without a connection, and no page is ever uploaded.
Six languages
English, Spanish, Portuguese, French, German and Hebrew are read, and their words are set again for editing: Hebrew from right to left, in a Hebrew font.
Slides and posters too
A page that is a picture with words in it, such as a slide exported as an image, is read line by line: words on a grid, in a colored box, light on dark. Double-click them and they are set again where they stood, in the closest font and in their own color, while the picture around them stays as it was. Text you add beside them takes their look.
How to edit a scanned PDF
Open the scan: choose the file or drop it on this page.
Choose the language of the page, then Recognize text, for this page or for all pages.
Double-click the words you want to change and type.
Look the result over and save.
The editor is right here. Open your PDF to begin.
Questions and answers
How good is the recognition?
Clean scans of printed pages are read well; faint, skewed or handwritten pages less so. Read over the words before you rely on them.
Does my scan go to a server to be read?
No. The pages are read by your browser. Many scans are passports, contracts and medical records, and they stay with you.
Can I just make the scan searchable?
Yes. Recognize the text and save. The page looks as it did, and its words can now be found and copied.
Can I edit a presentation whose slides are pictures?
Yes. Choose the language, press Recognize text for all pages, then double-click the words you want to change. They are set in the closest of the editor’s fonts, which need not be the one the slide was made in, and they say what the reader read: look them over. Words the reader did not find stay part of the picture.