OCR Conversion Services

Professional OCR Conversion Services with Expert Manual Correction for Reliable Searchable Output

We provide expert OCR conversion outsourcing solutions for businesses, publishers, legal firms, healthcare providers and government offices that need scanned documents, image-based PDFs and photographed materials converted into searchable, editable and structured digital text with the accuracy that research, editing, system import and compliance use cases require. Raw OCR output without manual correction is rarely accurate enough for professional use — character recognition errors, structural problems and formatting failures accumulate across every page and undermine the usefulness of the converted output.

Our professional offshore OCR team in India combines industry-standard OCR processing with systematic manual correction — reviewing every page of output for character errors, structural problems, formatting inconsistencies and missing content — so the final text is reliably accurate rather than requiring extensive post-conversion cleanup from your team.

Both single-document conversions and large-scale archive OCR projects are supported. Every new OCR project begins with a source quality assessment on a sample of your documents so you receive a realistic accuracy expectation before production is committed.

Get a Free Sample Conversion → View Pricing

✓ OCR Processing with Manual Correction ✓ Searchable PDF Creation ✓ Scanned Document Text Extraction ✓ Large Archive OCR Projects ✓ Multiple Output Formats

Trusted & Secure

🔒NDA Protected 🌐GDPR Aware ✅99.9% Accuracy 🎯Free Pilot Batch ⚡Fast Turnaround 🌍45+ Countries Served

5000+ Completed Projects

90% Returning Clients

16+ Years Experience

45+ Countries Served

50+ Professionals Team

Service Overview

Expert OCR conversion solutions that produce accurate, immediately usable text from any scanned source

Source quality assessment before production
OCR engine processing with appropriate settings
Page-by-page manual error correction
Structure and formatting preservation
Output format preparation for your workflow
Quality review before every delivery

OCR accuracy is primarily determined by source quality and document characteristics — scanning resolution, font clarity, layout complexity and physical document condition. Good source material at adequate resolution with clear, standard fonts achieves high initial OCR accuracy. Degraded, complex or non-standard sources require proportionally more manual correction effort.

We always combine OCR processing with manual correction — never treating automated output as a completed deliverable. The correction process is systematic, not sampling-based: every page of output is reviewed against the source for character errors, structural problems and formatting failures.

As a professional OCR conversion outsourcing company in India, SDES provides cost-effective, high-volume OCR processing and correction capacity that makes systematic, accurate OCR conversion affordable for archive projects where doing the job correctly matters.

OCR Services

Expert OCR Conversion Solutions for Every Document Type and Source Quality

Each OCR project is approached with source quality assessment, appropriate processing settings and thorough manual correction.

Printed document OCR conversion

We convert printed, typewritten and laser-printed text documents from scanned image or image-based PDF sources into clean, accurately corrected digital text using OCR processing followed by systematic manual correction. Well-printed text documents at 300 DPI or above achieve high initial OCR accuracy, but even high-accuracy OCR output contains character errors, structural artefacts and formatting problems that become compounded at document scale. Our correction process addresses individual character errors (common misrecognitions: 1/I/l, 0/O, rn/m, cl/d, vv/w), word-level errors, structural problems at line breaks and paragraph boundaries, table structure errors and header/footer text mixed into body content.

Scanned form and structured document OCR

We convert scanned forms, questionnaires, invoices, receipts, statements and other structured documents into searchable PDF or extracted data formats. Structured document OCR requires zone-based recognition that maps form fields to defined data positions — header information, line items, totals, reference numbers, dates and other consistently positioned fields. For tabular data extraction from scanned tables, we produce structured output with correctly mapped columns rather than raw text extraction that loses the column alignment information.

Legal and financial document OCR conversion

We convert legal documents, contracts, court filings, financial statements, audit reports and compliance documents into searchable, editable formats with the accuracy that legal research, due diligence and financial analysis workflows require. Legal and financial OCR conversion is particularly sensitivity to character-level accuracy in numbers, dates, names and defined legal terms — where a misrecognised character changes meaning rather than just introducing a minor typo. Our correction process for legal and financial documents applies additional attention to numeric fields, proper nouns, defined terms and date fields.

Searchable PDF creation

We add searchable OCR text layers to scanned PDF documents — making document content searchable in PDF readers, document management systems and enterprise search platforms without changing the visual appearance of the original scanned page. Searchable PDF is the most common OCR output format for document management use cases because it preserves the original page image while making the content findable. Text layer accuracy determines search reliability — an inaccurately OCR'd text layer returns incorrect or missed search results. Our correction process ensures the text layer accurately reflects the document content so searches return the results your team expects.

Large archive OCR processing

We process large document archives through organised OCR and correction workflows with progress reporting and consistent quality standards maintained throughout. Archive-scale OCR projects — legal record collections, medical record archives, historical document digitisation, large commercial contract archives — require structured production management: batches sized for quality checking, coverage tracking by document category or date range, consistent correction standards across operators and delivery of completed batches for use while remaining batches continue in production.

Inputs and Output

We work with the files you already have

📂 Source formats we accept

Scanned PDF documents (any resolution)
Image files (TIFF, JPEG, PNG, BMP)
Multi-page document image collections
Image-based eBook and publication files
Legacy microfilm and microfiche scans

📤 Delivery formats

Searchable PDF with corrected text layer
Editable Word and plain text documents
Structured data CSV and Excel output
XML structured content for system import
Correction report and accuracy summary

How It Works

How we manage OCR conversion projects

Source Quality Assessment

Sample of your source files reviewed to determine document type, image quality, language, layout complexity and expected conversion accuracy. Realistic expectations confirmed before work is quoted or committed.

NDA and Secure Setup

NDA before files are shared. For regulated content types — legal, medical, financial — specific handling requirements documented before production begins.

Pilot Conversion

Representative sample converted and returned for your review. Output format, accuracy level, exception handling and source-specific issues confirmed before full production proceeds.

Batch Production with Manual Correction

Full archive converted in defined batches. Manual correction applied throughout production — not as a post-processing step. Correction is systematic and applied to every page, not sampled.

Exception Documentation

Pages where source quality limits achievable accuracy documented specifically with page reference and issue noted. Output validated against target format requirements before delivery.

Delivery with Validation Report

Converted files delivered alongside accuracy summary, exception documentation and — for XML projects — schema validation report confirming compliance before submission to your system or publisher.

Have documents that need accurate OCR conversion with manual correction?

Send a sample of your source documents and describe your target format. We convert a free sample and return the output so you can verify accuracy and correction quality before committing to the full project.

Get a Free Sample Conversion →

Free OCR sample conversion returned within 24 hours.

Why Outsource to SDES?

Why organisations outsource OCR, PDF and document conversion to SDES India

Source quality assessed upfront — realistic accuracy expectations given, not generic promises
Manual correction applied to every page — never sampling-based review only
Output format tested against your target system before full production
Schema validation included in every XML and structured conversion project
Large archive conversions tracked by coverage and delivered in batches
Exception documentation for pages where source limits achievable accuracy

Automated conversion tools produce output that requires correction. The gap between raw OCR output and reliably accurate, searchable text is significant and source-dependent — it only matters if you account for it. Our process always combines conversion tools with systematic manual review so the output you receive is ready to use rather than ready to correct.

We give clients realistic accuracy expectations based on their actual source files before any project commitment. If your source has characteristics that limit achievable accuracy, we tell you upfront rather than quoting a generic accuracy figure that does not apply to your specific documents.

Start Your Project →

Industries We Support

Professional OCR solutions across document-intensive industries

eCommerce

Online retailers and marketplace sellers that need accurate product data, catalog management, marketplace listing support and order management data entry handled consistently at scale without burdening their internal team.

Healthcare

Medical practices, billing companies and healthcare providers that handle patient records, clinical data, insurance information and billing documentation requiring precise entry and confidential handling.

Real Estate

Property firms, real estate agencies and title companies managing listing details, transaction records, deed data and client databases across large and growing portfolios.

Finance

Accounting firms, finance departments and financial services companies processing invoices, statements, claims, reconciliation records and financial document data at recurring volume.

Legal

Law firms and legal departments digitising and managing case files, contracts, compliance records, court documents and legal correspondence with appropriate confidentiality controls.

Logistics

Freight companies, 3PLs and supply chain teams maintaining accurate shipment records, supplier data, inventory counts and delivery documentation across high-volume operations.

Manufacturing

Manufacturers needing product specifications, supplier records, quality inspection data and inventory management data entry for production and procurement systems.

Agencies

Marketing agencies, digital agencies and business services firms outsourcing data entry, list building, research and campaign data management to a reliable offshore partner.

Quality and Security

Accurate output, handled securely

NDA before any source documents are shared. For legal, financial, medical and personally identifiable content, access is restricted to the conversion team assigned to your project. Source documents are not retained beyond the delivery period.

Manual correction is not sampling-based — every page of output is reviewed against the source before delivery. Pages where source quality prevents reliable conversion are flagged with specific notes rather than delivered with silent errors mixed into the clean output.

For JATS XML and medical publication conversion, output is validated against current PMC schema requirements before delivery. Schema errors are corrected before the file leaves our team. For other XML schemas, validation runs against your specified DTD or XSD.

🔒 NDA Protected Before files are shared

🌐 GDPR Aware EU data handling

✅ 99.9% Accuracy Multi-level QA checks

🛡️ Secure Transfer Encrypted file access

📋 Exception Log Every delivery

👥 Project Team Only Controlled access

Client Feedback

What clients say about our OCR conversion work

★★★★★

220 journal articles needed JATS XML conversion for PubMed Central. SDES assessed a sample, ran a pilot and validated before production. PMC submission achieved 97% first-pass acceptance. The three needing revision had missing DOI data in our source — SDES flagged this during production, not after submission.

Editorial Production Manager Biomedical Publisher, USA

★★★★★

1,200 mixed PDF financial statements needed consistent Excel extraction. SDES identified the source type distribution, gave us different accuracy expectations for each type and delivered with source type indicated. That transparency let us apply the right level of review to each segment.

Finance Systems Manager Accounting Practice, UK

★★★★★

A 40-year archive of legal correspondence — 28,000 scanned pages — had been digitised without metadata. SDES converted and indexed the full collection in six weeks. OCR correction was applied consistently and indexing was accurate throughout, not just on recent documents.

Knowledge Management Director Litigation Firm, Australia

FAQs

Questions clients ask before outsourcing OCR conversion

Do you always correct OCR output manually?

Yes. Manual correction is always part of our OCR process. We never deliver raw automated OCR output without review and correction.

What OCR accuracy level can I expect?

Accuracy depends on source quality. We assess your specific documents before quoting and provide a realistic estimate. We always apply correction to improve initial accuracy.

Can you handle documents with mixed fonts and complex layouts?

Yes. Mixed fonts, multi-column layouts and complex document structures are handled with appropriate processing settings and additional manual correction.

Can you create searchable PDFs without changing the visual appearance of the pages?

Yes. OCR text layers are added to scanned PDFs invisibly, preserving the original page image appearance.

Can you handle large archive OCR projects?

Yes. Large archive OCR is processed in batches with quality consistency throughout and progress reporting provided.

What output formats are available?

Searchable PDF, Word, plain text, CSV, Excel, XML or any custom format your workflow requires.

Related Services

Other services you may need

📩 Get a Free Sample Conversion

💬