How to use this PDF tool
- 1
Choose a PDF; the browser checks each page for existing text.
- 2
Select Smart or Force OCR, a page range, and Balanced or High accuracy.
- 3
Run OCR locally and download the validated searchable PDF or extracted text.
OCR PDF
Recognize printed text in scanned PDF pages and add a searchable text layer while preserving the original page appearance.
Drop a file here
or choose a file from your device
Processed on your deviceProcessed locally in this browser. OCR engine and English language data download from PDFHope when needed; PDF pages are not uploaded.
About this tool
Turn image-only scanned pages into a searchable PDF without uploading your document.
OCR (optical character recognition) reads printed words from a rendered PDF page. PDFHope adds an invisible text layer to the original PDF pages, so the visible scan stays intact while recognized words can be searched and selected.
Smart OCR checks each page for an existing usable text layer and processes only likely scans. You can choose a page range or force OCR on pages with existing text, although forcing can duplicate searchable words. English is the verified language in this release.
Features
- Local OCR with no document upload
- Smart page detection
- Balanced and High accuracy rendering
- Invisible word-level text layer
- Original visual page content retained
- Optional extracted text download
Output and quality
Balanced renders at about 220 DPI and High accuracy at about 300 DPI, capped at 4096 pixels and 12 megapixels per page for memory safety. Recognition is an estimate; search and copied text should be checked against the visible scan.
Limitations
Handwriting, low-resolution or skewed scans, unusual fonts, complex tables, and non-English text can be inaccurate. This tool adds searchable text, not spreadsheet structure. Rewriting a PDF can invalidate certificate-based signatures or affect advanced forms and annotations.
Tips for better results
- Use upright, clear printed scans where possible.
- Try High accuracy for small print.
- Choose a smaller range for large documents.
- Review copied text before relying on it.
Troubleshooting
Why did OCR find no text?
Check the scan resolution, selected language and page range; try High accuracy or a clearer scan.
Why can’t the language data load?
The OCR engine downloads English model data when needed. Check the connection and retry.
Why is the text imperfect?
Recognition depends on print clarity, contrast, orientation and layout.
Frequently asked questions
What is OCR PDF?
It creates a new PDF with recognized printed words placed as an invisible searchable text layer over image-only pages.
Does OCR change how my PDF looks?
The original page graphics are retained. The new text layer is invisible, though advanced document features can change when the file is rewritten.
Will the text become searchable?
Recognized printed English words are embedded in the PDF and validated with PDF text extraction before download.
Can I copy recognized text?
Yes, where the OCR result is accurate and the PDF viewer supports selection. Review copied text for mistakes.
Does PDFHope upload my scanned PDF?
No. Processing runs locally. Only OCR engine and English model assets are downloaded.
Can OCR read handwriting?
Handwriting accuracy is often poor; this tool is intended for printed text.
Which languages are supported?
English is the verified language in this release. Arabic, Urdu and other languages are not advertised until their text layers are validated.
Why is OCR text inaccurate?
Blur, skew, low resolution, handwriting and complex layouts can confuse recognition.
Can OCR work on only some pages?
Yes. Smart mode skips pages with usable existing text, and a custom range narrows processing further.
Will existing digital signatures remain valid?
Not guaranteed. Adding a text layer rewrites the PDF and can invalidate certificate-based signatures.