OCR a PDF — Free, In Your Browser, No Upload

OCR stands for Optical Character Recognition. In a PDF context, OCR turns image-based pages — scans, faxes, photos, rasterized exports — into pages with a real text layer underneath the picture. The visible content stays exactly the same. The difference is that Ctrl+F finds words across the document, you can select and copy text, screen readers can read it, and any PDF→Word / PDF→Excel / PDF→Text tool can extract data from it.

Two kinds of PDFs in the wild

1. 1

   Open the OCR tool

   Visit pdfedit.com/ocr-pdf in any modern browser. No install, no signup, no extension required — the page works offline once it's loaded.

2. 2

   Drop your scanned PDF

   Drag any PDF onto the dropzone above, or click Select PDF to browse. The file loads into your browser memory only — there is no server upload step at any point in the workflow.

3. 3

   Pick the document language

   Choose what language Tesseract should recognize: English, Spanish, French, German, Italian, Portuguese, Russian, Arabic, Chinese, Japanese, Korean, Hindi and 20+ more. For mixed-language documents, pick the dominant language — Tesseract handles small amounts of other scripts reasonably well.

4. 4

   Click Run OCR

   Each page is rendered at high DPI, recognized by Tesseract, and re-assembled into a searchable PDF with an invisible text layer. The output looks identical to the source — same page image, same layout, same signatures and stamps. The only difference is selectable, copy-paste-able text underneath.

5. 5

   Download & verify

   The searchable PDF saves to your device. Open it in any PDF reader and try Ctrl+F on a word from the document — it should jump straight to the right page. Job done.

Adobe Acrobat (and some other OCR tools) offer two output modes. We ship "Searchable Image" by default because it's the safer choice for most documents. Here's the difference:

1. 1. Scan at 300 DPI or higher.

   Tesseract was trained on 300 DPI scans. Lower resolutions lose character detail and accuracy drops fast below 200 DPI. Most consumer scanners default to 300 DPI; phone scanning apps usually adjust automatically.

2. 2. Ensure pages are straight.

   Skewed pages (anything more than ~5° off square) confuse the line detector. Most modern scanning apps auto-deskew; if yours doesn't, rotate before OCR.

3. 3. Pick the right language pack.

   "English" and "Spanish" are different models — using the wrong one for a French document will produce gibberish. For genuinely mixed-language documents, combine packs (the language picker accepts e.g. eng+spa).

4. 4. Clean scans beat fancy scans.

   Black-and-white text on a clean white background OCRs at near-99% accuracy. Yellowed paper, grainy photos, or text on coloured backgrounds drops accuracy. If you have control, scan in grayscale or pure black-and-white rather than full color.

5. 5. Use higher render scale (3× / 288 DPI) for small print.

   If your source has small text — receipts, footnotes, dense legal print — bump the render-scale option to 3× before OCR. Slower per page but recovers detail Tesseract would otherwise miss.

6. 6. Handwriting needs a different tool.

   Tesseract is tuned for printed text and is unreliable on handwriting. For handwritten OCR, Google Cloud Vision Handwriting and Microsoft Read are the leading options (both paid).