OCR.space

OCR.space is an OCR service for turning images and PDFs into editable text through a browser or API, with an offline self-hosted edition for local deployments. It suits developers and teams that need OCR in a workflow, especially when searchable PDFs, document structure, or offline processing matter. Its broad access options and usable free quota are balanced by tight file and PDF limits on the cheaper plans.

Overview

The online OCR tool accepts JPG, PNG, GIF, and PDF files without registration, while the API returns extracted text in JSON and handles images and multi-page PDFs. The API also supports searchable PDF output. For organizations that cannot send documents to a hosted service, OCR.space Local runs offline on a PC, in a data center, or in virtualized and cloud environments such as AWS AMI or Microsoft Azure.

The service is based in Heidelberg, Germany, and its FAQ says it is available 24/7. That availability is not a promise on the free plan; PRO and PRO PDF instead include a 100% monthly uptime guarantee.

Key features

The three API engines give OCR.space useful range: Engine 2 is the default, while Engine 3 handles handwriting, tables, and more than 200 languages. Engine 3 is not the choice for searchable PDFs, which it cannot currently produce. For receipts, invoices, and other table-structured documents, the API's isTable option is recommended.

Searchable PDF generation is useful when scanned documents need to be searchable, but the free tier stamps those files with an “Generated by OCR.space” watermark. Engine 3 also has its own free-plan allowance of 2,500 conversions, separate from the 25,000 Engine 1/2 conversions.

OCR.space says uploaded documents are deleted after processing; searchable PDF downloads remain on its servers for 60 minutes before deletion. It says it is GDPR compliant, and PRO PDF and Enterprise users can obtain a signed GDPR data processing agreement at no extra cost. API examples cover Postman, cURL, C#, iOS, Java for Android, Node.js, Python, C++/QT, Ruby, and JavaScript. Support is offered by contact form, email, and a community forum monitored by tech support and OCR developers.

Pricing

The free plan is a practical starting point for modest workloads, but its 1 MB file cap, three-page PDFs, per-IP daily ceiling, and watermarked searchable output can rule it out for production document processing. PRO raises the monthly quota substantially and adds guaranteed uptime and priority support, yet keeps the same three-page PDF limit as Free. PRO PDF is the meaningful step up for large scans: its 100 MB+ file and 999+ page allowance address the bottleneck PRO leaves in place. Enterprise is aimed at custom, hardware-scale needs rather than ordinary usage. Local is the fit when offline operation is essential; contact sales for license pricing.

Platforms

OCR.space supports Android, iOS, Linux, macOS, Windows, web, API, and self-hosted use. That mix accommodates browser-based conversions, application integrations, and local deployments; it is particularly useful for teams that need more than one way to access OCR.

Who it's for

Choose OCR.space if you need an approachable browser tool alongside an API, or want to automate image and PDF extraction without building around a single OCR engine. It is also a strong fit for receipt and invoice workflows that benefit from table-aware processing, and for organizations that need an offline installation. It is less compelling when large PDFs are central but the budget only stretches to PRO, or when free searchable PDFs must be unbranded.

Pros and cons

• Pro: Browser OCR works without registration, and the API offers JSON output, multiple engines, and searchable PDF creation.
• Pro: Engine 3 covers handwriting, tables, and more than 200 languages, with a separate free conversion allowance.
• Pro: Local runs offline, a useful option for deployments that cannot rely on hosted processing.
• Con: Free use is constrained by a 1 MB API file limit, three-page PDFs, and 500 requests per day per IP.
• Con: Free searchable PDFs carry a watermark, and Engine 3 cannot create searchable PDFs.
• Con: PRO costs $30 a month but still caps PDFs at three pages, making PRO PDF the relevant tier for long documents.

Alternatives

Tesseract OCR is a free, open-source engine under the Apache License 2.0 for readers who want a self-hostable OCR engine rather than OCR.space's hosted service and paid PDF tiers. OCRmyPDF is free self-hosted software for Linux, macOS, Windows, and API use, but depends on external OCR and PDF tools. PaddleOCR is worth comparing for its official API free tier, which allows 20,000 document pages daily.

Veryfi Invoices OCR API is an alternative for invoice-focused workflows, with a Starter plan at $500 a month and a $500/mo minimum commitment. Mistral OCR offers API and self-hosted options, with OCR processing at $4 a month per 1,000 pages. EasyOCR is a free option for Windows, Linux, and macOS. Kraken is a free option for Linux and macOS. Asprise OCR SDK is a paid SDK with a free trial for Linux, macOS, self-hosted, and Windows use.

Browse more options in OCR API Software or PDF API Software.

Verdict

OCR.space is a strong choice for developers and teams seeking one service for browser OCR, API-based extraction, searchable PDFs, and optional offline deployment. Its free plan makes evaluation accessible, while PRO PDF is the sensible paid tier for substantial PDFs. Look elsewhere if you need long PDFs on a lower subscription or unwatermarked searchable output without paying.