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Nutrient DWS Accessibility API
Vienna, Austria
What it is
Nutrient DWS Accessibility API automatically tags PDF files and validates accessibility conformance. Send a PDF to the cloud API and it returns a tagged PDF with PDF/UA metadata, targeting PDF/UA-1 (ISO 14289-1). Its tagging detects H1–H6 headings, ordered and unordered lists, table rows and cells, reading order, annotations, and decorative artifacts. Nutrient reports 96.5% PDF/UA conformance across a 3,157-file validation corpus. The API accepts HTTP requests from any programming language, and quickstarts are available for Java, C#, JavaScript, Python, and PHP. The free plan is free and includes 20 auto-tagged pages and 100 validations per month. Paid plans start at $79 a month, with larger monthly page and validation quotas on higher listed plans. Monthly quotas do not roll over, and requests are blocked after a quota is reached unless the customer moves to a larger plan or uses pay-as-you-go. Auto-tagging reduces manual work but does not guarantee full accessibility compliance, so QA is recommended, especially for legally sensitive or high-stakes documents.
For and against
For
- Returns tagged PDFs with PDF/UA metadata.
- Detects headings, lists, tables, and reading order.
- Free plan includes 20 tagged pages monthly.
- Quickstarts cover five programming languages.
Against
- Monthly quotas do not roll over.
- Requests stop when a quota category is exhausted.
- Auto-tagging does not guarantee full compliance.
The verdict
The API combines PDF tagging and validation, with a free tier and several monthly quota levels. Its outputs still need review because automated tagging is not a guarantee of full compliance.
Who it suits
It suits developers and organizations that need PDF tagging and accessibility validation through an API. Teams handling legally sensitive or high-stakes documents should plan for QA of the returned files.
Plans and prices
Free
20 auto-tagged pages/month · 100 validations/month
Read 4 Oct 2026 · nutrient.io
Starter
200 auto-tagged pages/month · 1,000 validations/month
Read 4 Oct 2026 · nutrient.io
Professional
1,000 auto-tagged pages/month · 5,000 validations/month
Read 4 Oct 2026 · nutrient.io
Business
3,000 auto-tagged pages/month · 15,000 validations/month
Read 4 Oct 2026 · nutrient.io
Custom
10,000+ auto-tagged pages/month · unlimited validations · tailored quotas · dedicated support
Read 4 Oct 2026 · nutrient.io
On the record
- API access
- The API can be called from any programming language that can make HTTP requests, and Nutrient provides quickstarts for Java, C#, JavaScript, Python, and PHP.nutrient.io · read 4 Oct 2026
- Benchmark
- Nutrient reports 96.5% PDF/UA conformance across a 3,157-file validation corpus.nutrient.io · read 4 Oct 2026
- Company
- Nutrient says it serves thousands of organizations in more than 80 countries, including Fortune 500 companies and governments.nutrient.io · read 4 Oct 2026
- Compliance caveat
- Nutrient says auto-tagging reduces manual work but does not guarantee full accessibility compliance, and recommends validating outputs in QA, especially for legally sensitive or high-stakes documents.nutrient.io · read 4 Oct 2026
- Output
- The workflow accepts a PDF and returns a tagged PDF with PDF/UA metadata.nutrient.io · read 4 Oct 2026
- Payment security
- Payments are processed by Paddle, and Nutrient says it does not access payment data.nutrient.io · read 4 Oct 2026
- Purpose
- The cloud API automatically tags PDF files and validates accessibility conformance.nutrient.io · read 4 Oct 2026
- Quota behavior
- Monthly page and validation quotas do not roll over, and requests in a quota category are blocked after that quota is reached unless the customer moves to a larger plan or uses pay-as-you-go.nutrient.io · read 4 Oct 2026
- Security
- Nutrient says its infrastructure is SOC 2 Type 2 audited and GDPR-compliant, and API requests must use HTTPS.nutrient.io · read 4 Oct 2026
- Standards
- The API targets PDF/UA-1 (ISO 14289-1) conformance.nutrient.io · read 4 Oct 2026
- Support
- All plans include documentation and developer support, with additional support options depending on plan.nutrient.io · read 4 Oct 2026
- Tagging features
- It detects H1–H6 headings, ordered and unordered lists, table rows and cells, reading order, annotations, and decorative artifacts.nutrient.io · read 4 Oct 2026
- Validation-only
- A validation-only plan is not currently offered; all plans include both auto-tagged pages and validation quotas.nutrient.io · read 4 Oct 2026
