How to OCR a PDF Free
Step-by-step guide to running OCR on scanned PDF files. Make scanned documents searchable and copy-paste ready. Free, browser-based, no signup.
About How To OCR A PDF
OCR (Optical Character Recognition) converts a scanned PDF into a searchable, selectable text document. PDF AI Tools runs OCR entirely in the browser using a state-of-the-art neural network, producing a text layer without ever uploading your file.
Most OCR tools require server uploads and charge per page. Ours runs Tesseract.js with a LSTM neural engine locally in your browser, processing pages in parallel and handling 100+ languages — free and private.
How We Compare
Compared to desktop alternatives like Adobe Acrobat Pro (starting at $19.99/month), Smallpdf ($12/month for unlimited), or iLovePDF ($9/month Premium), PDF AI Tools delivers comparable quality at $0 for the core feature set. We skip the subscription friction by processing most operations directly in your browser with WebAssembly — no server infrastructure costs to pass on to users. Our AI features (summarization, chat, OCR) use a pay-as-you-go backend that keeps your total cost well under $5/month even for power users.
How to Use How to OCR a PDF Free
- Step 1: Upload your scanned PDF to the OCR PDF tool
- Step 2: Select the document language
- Step 3: Wait for OCR to run on all pages
- Step 4: Download the searchable PDF or copy the extracted text
Why Choose PDF AI Tools
We've built PDF AI Tools to replace expensive desktop software like Adobe Acrobat for 95% of common document workflows — at zero cost to you. Unlike competitors who gate features behind paywalls, add watermarks, or limit file sizes, our tools are genuinely free and genuinely unlimited. Your privacy matters: files processed client-side in your browser never touch our servers, and even AI-powered features use encrypted, auto-deleting processing pipelines.
Key Features
- Browser-side OCR using LSTM neural engine
- Supports 100+ languages
- Produces searchable, selectable text layer
- Handles handwriting and low-resolution scans
- Processes multi-page PDFs in parallel
- No file upload — fully private
- Output is searchable PDF or plain text extract
- Works on scanned invoices, contracts, and forms
Frequently Asked Questions
How accurate is browser OCR?
For clean, standard-font documents at 150+ DPI: 95–99% accuracy. For handwriting: 70–85%.
What languages are supported?
English, Spanish, French, German, Chinese, Japanese, Arabic, Hindi, and 100+ others.
Does OCR work on PDF forms?
Yes — OCR adds a text layer to scanned forms, making fields searchable.
Can I run OCR on a single page?
Specify a page range before processing to OCR only the pages you need.