Batch Image OCR failed or looks wrong? Troubleshooting guide
Troubleshoot extensions, file structure, dependencies, encoding, memory, and output error in Batch Image OCR while preserving the source.
Preserve the source first
Do not rename and overwrite the original, and do not treat a browser preview as the only acceptance record. Use a small copy and record size, producer, version, browser, and exact error.
The easy-to-miss fact for this format
For 12 scans named page-01 through page-12, confirm order first, sample the first and last lines of every page, then download combined text with filename separators.
Recommended troubleshooting order
- Test the page example or a smaller known-good file to confirm the tool runs.
- Check extension, signature, companion files, remote URL, and CORS; exclude a downloaded HTML error page.
- Supply the input again according to the workflow:
- Choose a small group of images and inspect their order.
- Set the main language and remove blurry or irrelevant pages.
- Start and review per-file progress and errors.
- Sample every page and download combined text with filename separators.
- Close memory-heavy tabs and retry in current Chrome or Edge.
- If it still fails, re-export from the producing application and validate in the receiving system.
Common questions and answers
How many images can I process?
Follow the displayed total-size cap and test 5–20 images first on your device.
Why is the order wrong?
The selected list order is used; reorder it or use sortable filenames before starting.
Are images uploaded?
Processing runs in this browser tab; the file is not uploaded to FreeTool to perform the task.
Limits that must not be bypassed
- Not a background job; refresh or close interrupts it
- Browser memory and CPU make hundreds of pages unsuitable
- Complex layout and table structure are not reconstructed
Privacy handling
Local input is not uploaded to FreeTool for processing; remote IIIF/DZI URLs are requested by the browser from their source. Troubleshooting images, OCR text, model summaries, and converted files may contain sensitive or copyrighted content. De-identify and confirm rights before sharing.