Will Your File Be Accepted? Check Before You Submit
A validator, not a converter: drop a file you already have, pick the portal, and know in seconds if it will actually pass — before you find out the hard way.
Most of the tools on this site change a file to fit a limit. The checker does the opposite — it doesn't touch your file at all, it just tells you the truth about whether it's going to pass.
Why this is a different job from compressing
Say you already prepared a file weeks ago — compressed it, merged it, whatever. You're not sure anymore if it fits the specific portal you're applying to right now, or if you even prepared it for the right one. Re-running it through a compressor "just to be safe" doesn't answer that question; it just produces another file you're equally unsure about.
The checker answers the actual question: for this specific portal, does this specific file pass, right now, exactly as it is?
How it works
- Pick the portal from the list — Cursus Sup, DGSN, Campus France, CIN, and more as they're added.
- Drop the file you already have.
- Get an instant pass or fail, broken down by what was actually checked: format and size, each shown separately.
If it fails, you're not left guessing what to do about it — there's a direct link into the matching compression tool, already set to the correct target for that portal.
What it checks, and what it doesn't
It checks format (is this the file type the portal expects — an image, or a PDF?) and size (is it under the portal's stated limit?). It does not check the actual content — whether the photo looks right, whether the PDF has the correct pages in the correct order, whether your signature is legible. Those still need a human look — the checker's job is narrowly the two things that get files auto-rejected by an upload form before a human ever sees them.
A note on the limits themselves
The size limits used here are our best current estimate based on common concours requirements — not something officially confirmed by every portal individually, and portal requirements do change over time. Treat a "pass" here as a strong signal, not an absolute guarantee, and always glance at the official portal's stated requirements before a final submission if there's any doubt.
The five-second habit worth building
Before you submit any dossier: run every file through the checker first. It costs nothing, happens instantly, and the alternative — submitting blind and finding out from a rejection — often costs you a resubmission window you don't get back.