How to Reduce PDF File Size for Court Filing
CM/ECF rejected your filing because the PDF is too large. Or you can see it's going to be too large before you even try. Either way, you need to get the file smaller without destroying the quality courts require. Here are five methods, ranked by effectiveness.
Why Court PDFs Get Too Large
The single biggest cause of oversized court PDFs is scanning. When you scan a paper document, the scanner creates a high-resolution image of each page. That image is dramatically larger than the same text stored as actual text characters. A 20-page contract saved from Word is roughly 200 KB. The same 20 pages scanned in color at 600 DPI can hit 30-40 MB — over 100x larger for identical content.
The second biggest cause is phone photos used as exhibits. Modern phone cameras produce images that are 3-8 MB each. Ten exhibit photos means 30-80 MB before conversion. Most federal courts cap individual PDFs at 35 MB. See our complete table of file size limits by court.
How Big Is Each Page?
Here's what a single page typically costs you in file size, depending on how it was created:
| Page Type | Typical Size | Pages per 35 MB |
|---|---|---|
| Text from Word/Docs (save as PDF) | 10–50 KB | 700–3,500 |
| Text with simple graphics | 50–200 KB | 175–700 |
| B&W scan at 300 DPI | 100–200 KB | 175–350 |
| Grayscale scan at 300 DPI | 200–400 KB | 88–175 |
| Color scan at 300 DPI | 300–600 KB | 58–117 |
| Color scan at 600 DPI | 1–3 MB | 12–35 |
| Phone photo (full resolution) | 3–8 MB | 4–12 |
That last row is the problem. Twelve full-resolution phone photos already exceed a 35 MB limit. You don't have a document problem — you have a resolution problem.
Five Methods to Reduce File Size
Method 1: Convert from source instead of scanning
If the document exists electronically — a Word file, a Google Doc, an email, a web page — convert it directly to PDF rather than printing it out and scanning it back in. This is by far the most effective approach because text-based PDFs are 50-200x smaller than scanned versions of the same pages.
In Word: File → Save As → PDF. In Google Docs: File → Download → PDF Document. For emails: most email clients let you print to PDF directly. For web pages: press Ctrl+P → select "Save as PDF." The resulting file will be small, text-searchable, and high quality.
This seems obvious, but pro se filers frequently print digital documents, scan them, and file the scans — creating enormous files for no reason. If you have the digital original, use it.
Method 2: Scan in black and white at 300 DPI
If you must scan paper, these two settings control 90% of the file size: color mode and resolution (DPI).
Set your scanner to black and white (not grayscale, not color) for any document that's primarily text — contracts, letters, printed emails, court orders, medical records. Black and white uses roughly one-eighth the storage of color for text documents. Use color only when it conveys essential meaning: photographs, highlighted passages, color-coded charts.
Set resolution to 300 DPI. This is what PACER recommends and what most courts specify. Higher resolution (600 DPI) doubles file size with no meaningful improvement in legibility for standard text. Lower resolution (150 DPI) may produce text that's hard to read on screen.
The Northern District of Georgia specifically instructs filers: if a scanned PDF with fewer than 700 pages exceeds the 30 MB limit, your scanner settings are wrong.
Method 3: Compress the PDF
PDF compression tools reduce file size by optimizing images, removing redundant data, and downsampling high-resolution elements. Compression can cut file size by 50-80% on image-heavy PDFs without visible quality loss.
In Adobe Acrobat: File → Save As Other → Reduced Size PDF. Or use the advanced optimization: File → Save As Other → Optimized PDF, which gives you control over image quality settings.
Free alternatives: Most online PDF tools offer compression. However, be cautious with sensitive legal documents — online tools upload your file to their servers. For confidential filings, use offline tools or the print-to-PDF method instead. Privacy matters when your exhibits contain personal information.
Method 4: Split into multiple files
When a filing genuinely needs to be large — voluminous exhibits, lengthy deposition transcripts, extensive medical records — the answer isn't forcing it into one file. Split it into multiple PDFs and upload them as separate attachments to the same docket entry.
Label each part clearly: "Exhibit A - Part 1 of 3 (Pages 1-50)," "Exhibit A - Part 2 of 3 (Pages 51-100)." Most PDF viewers have a split function, or you can use Adobe Acrobat's Extract Pages feature. Keep each part well under your court's per-file limit.
Note: some courts also set an aggregate limit per filing transaction. The District of Nebraska caps aggregate size at 100 MB per transaction. If you're filing hundreds of pages of exhibits, you may need to spread them across multiple filing transactions.
Method 5: Crop and clean before converting
Before converting images or scans to PDF, do basic cleanup. Crop unnecessary white space and borders around scanned pages. Remove blank pages. Straighten tilted scans. These steps won't transform a 50 MB file into a 5 MB file, but they shave off enough to sometimes make the difference between passing and failing a size limit. Phone photos especially benefit from cropping — your camera captures the entire desk surface, but only the document matters.
Converting exhibit images? ECF PDF produces properly sized court PDFs from your photos. Letter-size formatting, file size monitoring, and real-time warnings before you hit CM/ECF limits.
Open ECF PDF →A Real Example
Say you have 25 photographs from your phone that you need to file as Exhibit B. Each photo is 5 MB. That's 125 MB of raw images — way over any court's limit.
Bad approach: Drop all 25 into one PDF at full resolution. Result: ~120 MB file. CM/ECF rejects it everywhere.
Better approach: Split into three PDFs — Exhibit B Part 1 (photos 1-9), Part 2 (photos 10-18), Part 3 (photos 19-25). Each part is ~40-45 MB. Still over the 35 MB limit in most districts.
Best approach: Use a tool that resizes images to fit Letter-size pages at screen resolution rather than print resolution. A 5 MB phone photo displayed at Letter size only needs about 200-400 KB of image data. Now your 25 photos fit in one 5-10 MB PDF. Under every court's limit with room to spare.
This is what ecfpdf.org does — it converts your images to court-standard page sizes with reasonable resolution, keeping file sizes manageable without sacrificing the legibility courts require.
What Not to Do
Don't reduce resolution below 300 DPI for text documents. Courts can reject filings that are illegible. 300 DPI is the floor, not a suggestion.
Don't use lossy compression that creates visible artifacts. If you can see compression blocks or blurry text after compression, you've gone too far. The goal is invisible optimization, not visible degradation.
Don't convert text documents to images to "compress" them. This is backwards — you'd be converting small text data into large image data while simultaneously losing text searchability. Always keep text as text.
Don't zip your PDF. CM/ECF doesn't accept ZIP files. The PDF must be uploaded as a .pdf file. Compressing the PDF format itself (within the PDF structure) is fine; wrapping it in an archive format is not.