The form lists different limits for the document, photo and signature. Why?

They're different kinds of file. A document (PDF) is usually allowed 1–2 MB; a photo is often 50–200 KB; a signature image can be as low as 10–20 KB. Read each field's limit separately.

My compressed PDF is still rejected. What's wrong?

Common causes: the file is a KB over the limit (compress harder or drop a page), the format is wrong (some forms want JPG, not PDF), or the dimensions are outside the allowed range for a photo.

Is it safe to compress an official document this way?

Yes — the content is unchanged, it just becomes an image of the pages. As long as it's still clearly legible, portals accept it. Keep an uncompressed copy for your records.

PDF and photo size limits for online application forms

Useful Hacks Team·August 29, 2026

The short version: read each upload field's limit separately, then use Compress PDF for the document and Resize Image for the photo and signature. Most document limits (1–2 MB) are easy to hit with a scanned PDF.

Compress PDF

Reduce PDF file size by rendering pages as compressed images.

Open Compress PDF

Read the requirement carefully

Application portals almost always have three separate limits:

Document / certificates (PDF): commonly 1 MB or 2 MB, sometimes 500 KB.
Photograph (JPG): often 50–200 KB, with dimension and aspect-ratio rules.
Signature (JPG): frequently 10–50 KB.

Trying to force everything under the smallest number is a common mistake. Handle each field on its own terms.

The document

Scan or photograph the pages, combine them with Image to PDF or Merge PDF.
Run the result through Compress PDF — Balanced first, then Smallest.
If a multi-page scan won't fit, remove anything the form doesn't ask for with Split PDF.
Detailed walkthrough: compress a PDF to under 1 MB.

The photo and signature

Use Resize Image to match the required pixel dimensions, then Compress Image to get under the KB limit. Full steps: resize a photo and signature for forms.

Before you submit

Open every file and confirm it's still legible.
Check the file *format* matches (PDF vs JPG) — not just the size.
Keep the originals.

Do it now

Open Compress PDF for the document, or Resize Image for the photo.

Frequently asked questions

The form lists different limits for the document, photo and signature. Why?: They're different kinds of file. A document (PDF) is usually allowed 1–2 MB; a photo is often 50–200 KB; a signature image can be as low as 10–20 KB. Read each field's limit separately.
My compressed PDF is still rejected. What's wrong?: Common causes: the file is a KB over the limit (compress harder or drop a page), the format is wrong (some forms want JPG, not PDF), or the dimensions are outside the allowed range for a photo.
Is it safe to compress an official document this way?: Yes — the content is unchanged, it just becomes an image of the pages. As long as it's still clearly legible, portals accept it. Keep an uncompressed copy for your records.

Related guides

How to compress a PDF to under 1 MB
A 1 MB upload limit is common on application portals. Here's what's realistic, how to get there, and when 1 MB simply isn't possible without losing the text.
How to resize a photo and signature for online forms
Application portals want the photo and signature at exact pixel sizes and tiny file sizes. Here's how to hit both without an app.
How to convert images to PDF (JPG, PNG, phone photos)
Turn one or several JPG or PNG images into a single PDF, in the right page order — what the tool does, the steps, and the common snags.