Can You Edit a Scanned PDF? Text PDFs vs. Image PDFs Explained
Yes. A scanned PDF is a photo of a page, so there are no characters inside, only pixels. MythosPDF edits it anyway: it finds the words with OCR, identifies the printed font from the letter shapes and redraws only the words you change in the scan's own ink and paper. Text PDFs are edited as real text. To tell them apart, try selecting a single word.
Two very different kinds of PDF
A text PDF stores characters, fonts and positions. Software can read, search and change them. A scanned PDF stores an image of a page, like a photo. It may look identical, but to a computer it's a grid of pixels with no words in it.
How to tell in 10 seconds
- 1Open the PDF and try to select a single word with your cursor.
- 2If individual letters highlight, it's a text PDF and you can edit it with MythosPDF.
- 3If you can only select the whole page as a block, or nothing at all, it's a scan.
- 4Try Ctrl/Cmd+F for a word you can see. No match usually means a scan.
What about OCR?
OCR (optical character recognition) reads the words in an image. On its own it only adds an invisible text layer, so the scan becomes searchable but still looks the same. MythosPDF goes further: it uses OCR to find each word and its ink, identifies the font of the line, and redraws only the words you change. The rest of the page image stays byte for byte the same, and every edit is read back and checked before you see it.
Editing a scanned document
- •Drop the scan into MythosPDF, click a word, Shift+click to extend along the line, and type
- •Changes stay within one line; a longer word moves the rest of that line along
- •Handwriting, fonts that cannot be identified and words touching stamps are refused with the reason, never smudged
- •Only need search and copy? OCR PDF adds an invisible text layer and leaves the scan untouched