Compress a PDF for USCIS online filing — under the 12 MB file limit

How to use Compress PDF for USCIS

1. Choose your evidence PDF. If it opens with a password, remove the password first with the PDF Password Remover, because USCIS does not accept encrypted or password-protected files.
2. The Target size box shows 12000 KB, which the tool treats as 12,000,000 bytes.
3. Keep If needed, convert pages to images to reach the size ticked for scans and phone photos. Untick it to try a lossless rebuild only.
4. Tick Greyscale (smaller for text documents) for black-and-white records; leave it off for photos, colored stamps and ID cards.
5. Press the Compress to … button. Larger files take longer because every attempt redraws every page.
6. Check the New size and Method lines, open the result, and confirm every page is clear before you upload it.

The USCIS rules for uploaded evidence

The USCIS online filing instructions (pages last reviewed 7 October 2026, read 27 October 2026) set these rules for evidence you upload:

Two practical notes follow from the instructions. You can start uploading evidence while the system is still accepting a form you filed as a PDF. And while a case is pending, extra evidence, including a Request for Evidence response, goes through the Documents or Notices tab, using the uploader at the bottom of the tab.

USCIS does not say whether 12 MB means 12,000,000 or 12,582,912 bytes. A target of 12,000,000 bytes is under both, and the tool shows such a file as about 11.4 MB because it counts 1,024 bytes to the KB, as Windows does.

What it does and when to use it

Twelve megabytes is roomy for typed documents. A tax return transcript or an employment letter saved from a computer is usually a small fraction of it. The limit starts to matter with evidence that is long and scanned: a year of joint bank statements, a lease with its renewals, a stack of photographs and messages showing a relationship, or medical records for a waiver. Phone scanner apps save each page as a large color photo, and a few dozen pages can go past 12 MB.

The tool takes that one oversized file and brings it under the limit, using no more compression than it needs.

How it works in your browser

• A file already at or under 12,000,000 bytes is returned unchanged.
• Next comes a lossless rebuild that repacks the file’s internal objects. Nothing on any page changes, and text stays selectable.
• If the file is still too large, each page is redrawn with pdf.js and saved as a JPEG. The tool starts at 150 DPI and searches quality between 35% and 85%.
• If 35% quality at 150 DPI is still too big, it lowers the resolution to a step it predicts will fit, chosen from a fixed list: 120, 100, 85, 72 DPI and lower.

Page budgets under 12 MB

US Letter pages at 150 DPI are about 1,275 × 1,650 pixels. Divide 12,000,000 bytes by the page count, and the bits-per-pixel figure shows how much the JPEG encoder can spend on each pixel.

These are divisions, not measurements. Dense small print, handwriting and photographs need more bytes than plain typed pages.

Worked examples

A 60-page set of bank statements scanned with a phone. Each page gets 200,000 bytes, about 0.76 bits per pixel at 150 DPI on Letter paper. That budget lets the tool try 150 DPI first, and the Method line tells you the resolution and quality it settled on. Grayscale is a good choice here, since the statements are black text on white.

Relationship evidence: photos and screenshots. Keep Greyscale off; color is part of what makes a photo recognizable. If the file holds hundreds of images, split it by year or by type so each file keeps more detail per page.

A 150-page medical record. Suppose the first attempt at 150 DPI and 35% quality comes to 20 MB. The tool computes 150 × √(12 ÷ 20) × 0.95 = 110.38 and moves to the next step at or below that, 100 DPI, then searches quality there. If small print in lab tables blurs at that point, split the record with the PDF Splitter and upload two files instead.

When the file still will not fit

• Split by exhibit. USCIS limits the size of each file, not the number of pages, so two files under 12 MB beat one unreadable file.
• Drop duplicates and blank pages with the PDF Page Deleter, for example the empty back of every single-sided page a duplex scanner captured.
• Rescan the worst pages. Flat paper, even light and a crop to the page edge save more bytes than any slider. JPG to PDF turns phone photos back into one PDF.
• Check the order before you upload. The PDF Page Reorder helps when a scanner fed pages out of sequence.

Limits and honest caveats

• Once pages become images, text cannot be selected or searched, and links and form fields are gone. The tool warns you when that happens. Keep your originals.
• Compression cannot make a blurred or skewed scan readable, and USCIS asks for all text to be readable.
• The tool does not decide what evidence your form needs; the form’s instructions do.
• Very large PDFs can run out of memory in a browser tab, especially on a phone. Split them first if the tool stops.

If USCIS asks for passport-style photos, the US passport photo tool makes the 2 × 2 inch print that you then scan or photograph. For the general method, see compressing a PDF for an online form.