Best Free OCR for Scanned PDFs (2026) — Tested on Arabic, Hindi & English

A scanned PDF is just a collection of images — the text isn't selectable, searchable, or editable. OCR (Optical Character Recognition) solves this by adding a text layer. But not all free tools do it well, especially for Arabic, Hindi, or Urdu PDFs. We tested 10 popular options to give you a clear answer.

What We Tested

We ran each tool through three scanned PDFs: a 5-page English business contract (300 DPI), a 3-page Arabic document (scanned at 200 DPI with RTL text), and a 4-page Hindi government form (Devanagari script). We evaluated:

• Text extraction accuracy (% of words correctly recognized)
• Whether the output is a searchable PDF or just raw text
• File size limits and page count restrictions
• Whether registration/signup is required
• Non-English script support (RTL, Devanagari)

Quick Comparison

1. FastOCR — Best for Multilingual Scanned PDFs

FastOCR is the top choice for non-English scanned PDFs. It's the only free tool in this comparison that produces a true searchable PDF output with proper RTL text direction for Arabic and Urdu, and correct Devanagari rendering for Hindi.

In testing, FastOCR achieved 98% accuracy on the English contract, 95% on the Arabic document (with correct right-to-left ordering), and 93% on the Hindi form. No other free tool matched these results for non-English scripts.

The free tier allows 3 PDF files per month with a free account (no credit card needed). Images are unlimited and require no signup at all. The Pro plan ($9.99/month) gives 100 PDFs, and the MAX plan ($24.99/month) is unlimited with batch processing.

FastOCR also includes AI Polish — a post-processing step that uses a language model to correct OCR errors in the extracted text. This is unique among free tools and noticeably improves output quality on degraded scans.

Best for: Arabic, Hindi, Urdu, Farsi, Chinese PDFs, or any multilingual document. Anyone who needs proper searchable PDF output, not just text extraction.

Limitations: PDF processing requires a free account. Limit of 3 PDFs/month on the free tier.

2. PDF24 — Best for English (Unlimited, No Signup)

PDF24 is the best option for English-only workflows. It's completely free with no page limits, no file count limits, and no registration required. It runs Tesseract OCR under the hood, which delivers solid English accuracy (~94%) and produces a proper searchable PDF.

The caveat is non-English support. Arabic and Hindi failed completely in our tests — the output was either empty or incorrectly recognized Latin characters. This is a Tesseract limitation for complex scripts.

Best for: English-only PDFs with no restrictions. Completely free and private — no account needed.

Limitations: No non-English support. Tesseract accuracy has a ceiling below AI-based tools.

3. Google Drive OCR — Surprisingly Capable

The Google Drive trick: upload your scanned PDF to Drive, right-click → Open with Google Docs. Google's Vision API extracts the text and places it above the scanned images. Accuracy is genuinely good — ~95% for English and ~92% for Arabic in our tests.

The critical limitation: Google Drive OCR does not produce a searchable PDF. You get the extracted text in a Google Doc, but the original PDF layout is not preserved. This makes it unsuitable for archiving or filing workflows where the original document appearance matters.

Best for: Quick multilingual text extraction where you don't need the original PDF layout preserved.

Limitations: Requires a Google account. No searchable PDF output. Text appears separately from the original document.

4. iLovePDF — Good for English, Fails Non-Latin

iLovePDF is a polished tool with a clean interface and solid English OCR. It produces searchable PDFs and handles multi-page documents up to 15 MB on the free tier. No account is needed for occasional use.

Arabic and Hindi support is non-existent in practice. The Arabic test document returned garbled text with wrong character ordering. Like most tools built on Tesseract without additional RTL processing, iLovePDF simply cannot handle right-to-left scripts.

Best for: English PDFs where you want a clean UI and searchable PDF output.

Limitations: 15 MB file size limit. No non-Latin script support.

5. Adobe Acrobat Online — High Quality, Tight Limits

Adobe's online OCR uses the same engine as the desktop Acrobat, which means excellent accuracy (~97% on English, ~90% on Arabic). It produces high-quality searchable PDFs with proper layout preservation. An Adobe account is required.

The severe limitation is the free tier: only 2 tasks per day. For any real workload — a batch of documents, a textbook — this becomes a bottleneck almost immediately. The paid Acrobat subscription starts at $19.99/month.

Best for: Occasional high-quality OCR when accuracy matters and you already have an Adobe account.

Limitations: 2 tasks per day. Requires Adobe account. Paid plans are expensive.

6. OCR.space — Free API, Inconsistent Quality

OCR.space has been around for years and offers a free web interface (limited to 3 pages on the free plan) and a free API (25,000 calls/month, 1 MB limit). It runs multiple OCR engines, with Engine 3 offering the best quality including some Arabic/Hebrew support.

The web interface is frustrating in practice: the 5 MB file limit is restrictive, errors are common on larger PDFs, and the free searchable PDF output includes a watermark. For developers wanting a quick API for English documents, it's a reasonable free option.

Best for: Developers wanting a free OCR API. Light English document processing.

Limitations: 5 MB limit, 3 pages free, watermark on PDF output, inconsistent non-English quality.

7. Smallpdf — Clean Interface, Gated Free Tier

Smallpdf offers a polished OCR experience and good English accuracy (~92%). The interface is clean and intuitive. However, the free tier is limited to 2 tasks per day and requires an account, making it impractical for any real volume of documents.

Best for: Occasional English PDF OCR if you prefer Smallpdf's ecosystem.

Limitations: 2 tasks/day, account required. Non-English support is poor.

Tips for Better Scanned PDF OCR Accuracy

1. Scan at 300 DPI or higher. This is the single biggest factor in OCR accuracy. 150 DPI scans can drop accuracy by 15–30%. If you're photographing with a phone, ensure good lighting and hold the camera steady.
2. Straighten skewed pages. Pages scanned at an angle cause line detection errors. Most scanners and phone apps have auto-deskew — enable it.
3. Use high contrast. Dark text on white paper gives the best results. Avoid scanning through colored or transparent covers.
4. Remove noise. Scanner dust, coffee stains, and handwriting margins all reduce accuracy. Crop to the text area when possible.
5. For Arabic, Urdu, Farsi: Use FastOCR specifically — it's the only free tool that handles RTL text direction and Arabic script shaping correctly. Try the Arabic OCR tool.
6. For Hindi and Devanagari: FastOCR and Google Drive are your best free options. Most other tools fail on conjunct consonants and matras. Try the Hindi OCR tool.

Frequently Asked Questions