feat:(pdfa-conversion) Implement Strict PDF/A Mode with Verification (#5663)

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# Description of Changes


This PR introduces a new "Strict Mode" for the PDF to PDF/A conversion
tool. When enabled, the application will use VeraPDF to verify that the
resulting file is perfectly compliant with the selected PDF/A standard.
If validation fails, the system will return a descriptive error instead
of a non-compliant file.



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## Checklist

### General

- [ ] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [ ] I have read the [Stirling-PDF Developer
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md)
(if applicable)
- [ ] I have read the [How to add new languages to
Stirling-PDF](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md)
(if applicable)
- [ ] I have performed a self-review of my own code
- [ ] My changes generate no new warnings

### Documentation

- [ ] I have updated relevant docs on [Stirling-PDF's doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
(if functionality has heavily changed)
- [ ] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)

### Translations (if applicable)

- [ ] I ran
[`scripts/counter_translation.py`](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/docs/counter_translation.md)

### UI Changes (if applicable)

- [ ] Screenshots or videos demonstrating the UI changes are attached
(e.g., as comments or direct attachments in the PR)

### Testing (if applicable)

- [ ] I have tested my changes locally. Refer to the [Testing
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md#6-testing)
for more details.

---------

Signed-off-by: Balázs Szücs <[email protected]>

This commit is contained in:

Balázs Szücs

2026-02-06 10:38:39 +00:00

committed by

GitHub

parent 00136f9e20

commit 0f5a0e694a

11 changed files with 102 additions and 27 deletions

									
										frontend/public/locales/en-GB/translation.toml
									
		+2
		
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				@@ -1303,6 +1303,8 @@ outputFormat = "Output Format"

				pdfaNote = "PDF/A-1b is more compatible, PDF/A-2b supports more features, PDF/A-3b supports embedded files."

				pdfaFormat = "PDF/A Format"

				pdfaDigitalSignatureWarning = "The PDF contains a digital signature. This will be removed in the next step."

				strictMode = "Strict Mode"

				strictModeDesc = "Error if conversion is not perfect (uses VeraPDF verification)"

				pdfxDigitalSignatureWarning = "The PDF contains a digital signature. This will be removed in the next step."

				pdfxDescription = "PDF/X is an ISO standard PDF subset for reliable printing and graphics exchange."

				fileFormat = "File Format"