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Nutrient DWS Accessibility API

nutrient.io

From $79/mo Free plan APISelf-hosted
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Spec score 8.0 #7 of 26 in PDF Accessibility Software

What it is

Nutrient DWS Accessibility API processes PDFs to add accessibility tags and check conformance. It returns a tagged PDF with PDF/UA metadata and targets PDF/UA-1 (ISO 14289-1). Tagging covers H1–H6 headings, ordered and unordered lists, table rows and cells, reading order, annotations and decorative artifacts. The API accepts HTTP requests from any programming language, with quickstarts for Java, C#, JavaScript, Python and PHP. Nutrient reports 96.5% PDF/UA conformance across a validation corpus of 3,157 files. Its free plan costs nothing and includes 20 auto-tagged pages and 100 validations per month. Starter costs $79 a month for 200 pages and 1,000 validations; Professional is $249 a month for 1,000 pages and 5,000 validations; Business is $499 a month for 3,000 pages and 15,000 validations. Monthly quotas do not roll over, and requests in a quota category are blocked when that quota runs out unless a larger plan or pay-as-you-go is used. Auto-tagging does not guarantee full accessibility compliance, so Nutrient recommends QA, especially for sensitive or high-stakes documents.

Spec sheet

Purpose
The cloud API automatically tags PDF files and validates accessibility conformance.Read 4 Oct 2026 · nutrient.io
Security
Nutrient says its infrastructure is SOC 2 Type 2 audited and GDPR-compliant, and API requests must use HTTPS.Read 4 Oct 2026 · nutrient.io
Support
All plans include documentation and developer support, with additional support options depending on plan.Read 4 Oct 2026 · nutrient.io
Headquarters
Vienna, AustriaRead 28 Sep 2026 · nutrient.io
Founded
2011Read 28 Sep 2026 · nutrient.io
Company
Nutrient says it serves thousands of organizations in more than 80 countries, including Fortune 500 companies and governments.Read 4 Oct 2026 · nutrient.io
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.Read 4 Oct 2026 · nutrient.io
Benchmark
Nutrient reports 96.5% PDF/UA conformance across a 3,157-file validation corpus.Read 4 Oct 2026 · nutrient.io
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.Read 4 Oct 2026 · nutrient.io
Output
The workflow accepts a PDF and returns a tagged PDF with PDF/UA metadata.Read 4 Oct 2026 · nutrient.io
Payment security
Payments are processed by Paddle, and Nutrient says it does not access payment data.Read 4 Oct 2026 · nutrient.io
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.Read 4 Oct 2026 · nutrient.io
Standards
The API targets PDF/UA-1 (ISO 14289-1) conformance.Read 4 Oct 2026 · nutrient.io
Tagging features
It detects H1–H6 headings, ordered and unordered lists, table rows and cells, reading order, annotations, and decorative artifacts.Read 4 Oct 2026 · nutrient.io
Validation-only
A validation-only plan is not currently offered; all plans include both auto-tagged pages and validation quotas.Read 4 Oct 2026 · nutrient.io

Plans and prices

Free Free 20 auto-tagged pages/month · 100 validations/month Read 4 Oct 2026 · nutrient.io
Starter $79 a month Billed monthly 200 auto-tagged pages/month · 1,000 validations/month Read 4 Oct 2026 · nutrient.io
Professional $249 a month Billed monthly 1,000 auto-tagged pages/month · 5,000 validations/month Read 4 Oct 2026 · nutrient.io
Business $499 a month Billed monthly 3,000 auto-tagged pages/month · 15,000 validations/month Read 4 Oct 2026 · nutrient.io
Custom Priced on request 10,000+ auto-tagged pages/month · unlimited validations · tailored quotas · dedicated support Read 4 Oct 2026 · nutrient.io

Every Nutrient DWS Accessibility API plan and price →

Strong points and limits

Strong points

  • Free plan includes 20 tagged pages monthly.
  • All plans include both tagging and validation quotas.
  • Works with any language that can make HTTP requests.
  • Quickstarts cover five programming languages.

Limits

  • Monthly quotas do not roll over.
  • Requests are blocked after a category quota is reached.
  • Auto-tagging does not guarantee full accessibility compliance.

Who it suits

It suits developers and organizations that need PDF tagging and accessibility validation through an HTTP API. Teams handling legally sensitive or high-stakes documents should plan for QA of the outputs.

Verdict

The API combines automatic tagging with validation and offers a free monthly allowance. Its quota limits and compliance caveat make output review and quota planning important.

Where Specifiction places it

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