How to Batch OCR Multiple PDFs at Once (Free, No Watermark)

BygImageReader Team
⚡ Quick Answer

To batch OCR multiple PDFs for free: open gImageReader, add all files to the queue at once (File → Open, select multiple), set the language, click Recognize All, then export everything as text or searchable PDFs. No watermark, no page limits, no upload.

One PDF is easy. Fifty is a chore — unless you batch it. Whether you’re digitizing an archive, processing a month of invoices, or converting a book collection, gImageReader’s built-in queue handles the whole stack while you do something else. No scripts, no paid “batch mode” upsell.

How to Batch OCR in gImageReader (4 Steps)

1

Load the whole batch at once

File → Open, then Ctrl+click (or Shift+click) to select all your PDFs and images. They land in the file queue in the sidebar — dozens or hundreds at a time.

2

Set language and zones once

Choose the recognition language in the toolbar — it applies to the whole queue. If your documents share a layout, define recognition zones on the first file; for varied layouts, leave auto-detection on.

3

Recognize all — then walk away

Click Recognize All. gImageReader processes files sequentially, showing progress per file. A 50-page batch typically takes a few minutes depending on your CPU and the chosen language models.

4

Export everything

Export the batch as plain text files or as searchable PDFs — one output per input file, named to match. Done.

Batch Tips That Save Hours

  • Sort inputs first. Name files consistently (e.g. invoice-2026-01.pdf) so outputs stay organized.
  • Use “fast” models for drafts. Run the batch with tessdata_fast for a quick pass, then re-run only the important files with tessdata_best.
  • Preprocess in bulk. If scans are washed out, batch-fix brightness/contrast in an image editor before importing — garbage in, garbage out, times fifty.
  • Watch memory on huge batches. For 500+ page jobs, split into smaller queues to keep things stable.
Scanning the paper first? Pair this workflow with a duplex ADF scanner — our scanner buying guide covers the best options — and feed the scans straight into the queue.
Related guides: Digitize Study Materials

Frequently Asked Questions

How can I OCR multiple PDF files at once for free?
Use gImageReader’s batch queue: select all PDFs via File → Open, set the language once, click Recognize All, then export as text or searchable PDFs. It’s free with no watermark or page limits.
Can gImageReader process hundreds of pages automatically?
Yes. The queue processes files sequentially while showing per-file progress. For very large jobs (500+ pages), split them into smaller batches for stability, and consider the “fast” language models for a first pass.
How do I batch convert scanned PDFs to searchable PDFs?
Queue all the PDFs in gImageReader, recognize them all, then export each as a searchable PDF. See our searchable-PDF guide for the export details — the batch workflow handles the repetition for you.

Clear your backlog this afternoon

Download gImageReader free — batch queue included, no premium tier.

Download gImageReader Free

Similar Posts