Tesseract OCR vs OCRmyPDF
The OCR engine, and the tool built on top of it.
The short answer
The distinction is the input. For a scanned PDF that needs a searchable text layer, OCRmyPDF is the tool: it takes a PDF in and gives a PDF back. For OCR on images, or for calling recognition from your own code, Tesseract is the engine underneath and is what you want directly. Tesseract does not read PDFs, so a PDF workflow that starts with Tesseract has to rasterise the pages first.
The difference that decides it
They are layers rather than rivals. Tesseract is the recognition engine that does the reading; OCRmyPDF drives it to put a searchable text layer into a PDF, which is what most people actually want. So the choice is about the shape of the job rather than quality: PDF in and PDF out points at OCRmyPDF, images or a custom integration points at Tesseract directly. If you are embedding OCRmyPDF, read its current dependency documentation rather than an older guide: pypdfium2 is listed there as an alternative to Ghostscript, so Ghostscript is not strictly required, while older and platform-packaged builds may differ and the licence of what you ship depends on the components you include.
Side by side
5 of 12 rows differ
| Compared | Tesseract OCR | OCRmyPDF |
|---|---|---|
| Files stay on your device | No server involved | No server involved |
| Takes | Images | |
| Produces | Text, PDF | PDF with a searchable text layer |
| Redaction | No redaction feature | No redaction feature |
| Price | Open source | Open source |
| Platforms | Windows · macOS · Linux | Windows · macOS · Linux · Self-hosted |
| Open source | Yes | Yes |
| Self-hostable | Yes | Yes |
| Data residency | Self-hosted | Self-hosted |
| Programmatic access | Embeddable library · Command line | Embeddable library · Command line |
| Owner | tesseract-ocr project | James R. Barlow |
| Website responded | Responded in 129 ms | Responded in 92 ms |
Rows that differ are shown in full contrast; rows where the two agree are dimmed. Every value here comes from the individual records, where each one names the page it came from - and says plainly when something has not been verified rather than filling the gap.
Tesseract OCR
Open-source OCR engine and command-line tool, with no graphical interface.
Read the full Tesseract OCR record
Visit Tesseract OCR Opens the vendor's own site.
OCRmyPDF
Command-line tool and Python library that adds a searchable OCR text layer to scanned PDFs.
Visit OCRmyPDF Opens the vendor's own site.
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