PDF to PDF/A Converter
Processing entirely on your device — large files may take a moment.
PDF Document and PDF/A Archive exist for different jobs: PDF (Portable Document Format) preserves layout exactly the same on every device, which makes it the standard for sharing documents, invoices, manuals and e-books. Convert PDF to PDF/A when a thesis, invoice, tender or government filing must be archived in a compliance-friendly, self-contained form.
This converter runs entirely in your browser using WebAssembly — your files never leave your device, nothing is uploaded, and there are no watermarks, sign-ups or queues. Drop in several files at once to convert them as a batch.
How to convert PDF to PDF/A
- 1
Select your files
Drag & drop your PDF files onto the area above, or click to browse. You can add multiple files at once for batch conversion.
- 2
Convert instantly
Click "Convert to PDF/A". The conversion runs entirely inside your browser using WebAssembly — no upload, no queue, no waiting.
- 3
Download results
Download each converted PDF/A file individually, or grab everything at once as a ZIP archive.
About the PDF format
PDF (Adobe, 1993; ISO 32000 since 2008) exists for one promise: the document looks identical everywhere, forever. Fonts get embedded, layout is fixed to the point, and a contract printed from a 2003 file renders the same as one created this morning. That fixed-layout guarantee made it the standard for invoices, manuals, forms, e-books and anything with legal or financial weight.
The same design is what makes PDFs stubborn. They are meant to be presented, not edited — text lives in positioning operators rather than paragraphs, so extraction and re-flow are approximations. Scanned PDFs are worse: pure images with no text layer at all until OCR enters the picture. Still, no other format comes close for final-form document delivery.
+ Strengths
- ✓Pixel-identical rendering on every device and printer
- ✓Fonts, images and color profiles travel inside the file
- ✓Mature ecosystem: forms, signatures, annotations, encryption
! Limitations
- −Hard to edit by design — even small changes need tooling
- −Text extraction is an approximation, not a conversion
- −Scanned PDFs are images without OCR
About the PDF/A format
PDF/A is what happens when archives get to rewrite the rules. Regular PDF allows external fonts, unembedded color profiles, JavaScript, video and encryption — conveniences that quietly rot: open the file on another machine in twenty years and the layout may not survive. PDF/A (ISO 19005) bans everything that needs an outside dependency or a runtime: fonts must be embedded, color must be tagged with an OutputIntent, encryption and executable content are forbidden. The result is a PDF that is a complete, self-contained time capsule.
There are conformance levels (b = basic, a = accessible) and generations (PDF/A-1, -2, -3). PDF/A-2b is the pragmatic sweet spot: it allows modern compression and transparency while keeping validation strict, and it is the level most universities, courts and tender portals actually ask for. Conversion runs Ghostscript's pdfwrite through a PDF/A OutputIntent with an embedded sRGB profile, then validates that nothing violates the profile.
+ Strengths
- ✓Self-contained: fonts and colors embedded, renders identically forever
- ✓Accepted by archives, courts, universities and tender portals
- ✓ISO-standardized — not a vendor-specific dialect
! Limitations
- −Forms, JavaScript and encryption are stripped
- −File size usually grows (embedded fonts + profiles)
- −Visually identical output — you get compliance, not a new look
Why convert PDF to PDF/A?
Think of it as moving your file to the container that fits the job. Hard to edit by design — even small changes need tooling PDF/A works differently: Self-contained: fonts and colors embedded, renders identically forever If any of that sounds like your task, run the conversion — it takes seconds and nothing leaves your device.
Frequently asked questions
Is this PDF to PDF/A converter really free?
Yes — completely free, with no sign-up, no watermark and no daily conversion limits. The site is supported by advertising.
Are my files uploaded to a server?
No. The conversion runs entirely inside your browser using WebAssembly, so your files never leave your device — that is what makes it instant and private.
Does it work on Windows, Mac, iPhone and Android?
Yes. Anything with a modern browser works: Windows, macOS, Linux, Android and iOS. No software installation is required.
How does the layout of my document turn out?
Pages keep their proportions automatically: images are fitted to A4-equivalent pages with sensible margins, and PDF pages are rendered at high resolution. You can preview the result right in the browser before downloading.
Does the conversion work offline?
Yes. Once the page has loaded, the conversion itself runs entirely inside your browser — you can even disconnect and keep converting. No file ever touches a server.
Will the layout of my PDF file be preserved exactly?
This converter renders your PDF content into PDF/A with pages, proportions and images kept as close to the original as the target format allows. Use the preview before downloading to confirm it looks the way you expect.