PDF Accessibility Checker
Scan any PDF for the accessibility issues that block screen readers — missing tags, undeclared language, scanned-image pages, and unlabeled form fields.
Upload a PDF to audit
Checks tagging, language, text layer, and form labels for screen-reader compatibility.
Accessibility Checker
Audits your PDF against common screen-reader and WCAG-adjacent requirements: tagging, declared language, real text layers, and labeled form fields — all analyzed locally.
PDF Accessibility Checker: Private, Browser-Based Processing
Learn how the PDF Accessibility Checker tool securely compiles and edits your files directly inside your browser sandbox.
🔒Zero Server Uploads (100% Private)
Your privacy is our highest priority. Unlike conventional online PDF converters that upload your sensitive documents to remote cloud storage servers, the PDF Accessibility Checker tool operates entirely inside your web browser's local sandbox. Your files are never transmitted across the network, ensuring absolute confidentiality for personal, legal, and financial documents.
⚡Powered by Local WebAssembly
We leverage cutting-edge browser technologies, including WebAssembly (Wasm) compiles of professional document engines and HTML5 canvas APIs, to power the PDF Accessibility Checker tool directly on your device's CPU. This local execution model provides instant processing speeds while bypassing slow internet upload and download queues.
✨No Limits, No Watermarks, No Sign-Up
The PDF Accessibility Checker tool comes with fully unrestricted access — no file size caps, daily usage limits, page count restrictions, or registration prompts. Every output is pristine quality without added branding or watermarks, making it ideal for both personal and professional workflows.
🔌Full Offline Capabilities
Since the PDF Accessibility Checker tool renders and processes everything client-side within your browser sandbox, it does not require an active internet connection to function. Once the page is loaded, you can safely disconnect your device and keep working offline.
About the PDF Accessibility Checker Tool
Check a PDF for common barriers that affect screen-reader users before publishing it. This browser-based PDF accessibility checker reviews useful signals such as document tags, language settings, text layers, and form-field labels while keeping the file on your device.
How to PDF Accessibility Checker
- 1
Open the PDF
Select the document you want to review locally.
- 2
Run the accessibility audit
Inspect tags, declared language, searchable text, and form labels.
- 3
Review flagged issues
Use the results to identify where the source document needs remediation.
- 4
Update the source file
Correct the document in its authoring tool, then rerun the check.
Common Use Cases
- Preflight a public PDF for accessibility issues
- Check whether a scanned PDF contains real selectable text
- Review form labels before distributing an application
- Support a PDF accessibility remediation workflow
Frequently Asked Questions
Can this checker make my PDF WCAG compliant?
It identifies common signals and issues, but accessibility conformance still requires reviewing the document content and repairing the source where needed.
Does it detect scanned-image PDFs?
Yes. It checks whether a useful text layer is present, which helps identify documents that may need OCR.
Are files uploaded for the audit?
No. The audit runs in your browser and the PDF remains on your device.