Quick answer
Many hiring systems accept PDF resumes but still enforce a size limit, often around 1MB. That is why search terms like compress resume PDF to 1MB and CV file too large keep showing up when applicants are trying to submit quickly.
A resume usually compresses better than a scanned administrative document because it often contains text and a simple layout. But resumes that include headshots, graphic templates, portfolio pages, or exported design elements can become much heavier than expected.
What usually works best
The best strategy is to keep the document readable and professional first, then reduce size only as much as needed. A resume is not a photo gallery. Recruiters need sharp headings, clean spacing, and easy-to-read text.
That makes ExactSizer useful for the final submission step. Instead of exporting the resume over and over from Word, Canva, or InDesign, you can compress the final PDF toward 1MB directly and adjust the PDF profile only if the upload system still rejects it.
If it still fails
If your resume includes a lot of visuals, start with a 1MB target. If the portal is stricter, use 500KB only when required. Smaller is not automatically better when hiring managers need to review the file on different screens and devices.
The same approach also works for cover letters, supporting documents, recommendation letters, and certificates that applicants upload with their resume.