How to Reduce PDF File Size for Court E-Filing
Most court e-filing systems cap submissions at 10–35 MB per document. Scanned exhibits frequently exceed these limits. This guide shows the fastest free methods to compress PDFs to the required size, then stamp them with ExhibitPrep without adding significant overhead.
- Federal court CM/ECF systems typically cap individual documents at 10 MB; state courts using Odyssey commonly allow 25 MB.
- Scanned PDFs are the most common cause of oversized exhibits — each page is stored as a compressed image, not searchable text.
- iLovePDF (ilovepdf.com/compress_pdf) and Smallpdf (smallpdf.com/compress-pdf) compress PDFs for free in any browser without account signup.
- Adobe's free online compressor (acrobat.adobe.com/compress-pdf-online.html) is reliable for native digital PDFs with embedded fonts.
- ExhibitPrep's stamping process adds less than 5% to the final file size — the stamp is a small vector text element, not a rasterized image.
- Compress before stamping, not after, so the stamp overhead applies to the already-reduced file size.
- If compression reduces quality below readable, split the exhibit into parts (Part 1 of 2, Part 2 of 2) rather than over-compressing.
- Some courts accept a ZIP archive of multiple exhibits instead of a single PDF — check your court's e-filing instructions before splitting.
Know Your Court's File Size Limit Before Filing
| E-Filing System | Typical Limit | Notes |
|---|---|---|
| Federal courts (CM/ECF) | 10 MB | Per document; some districts allow larger attachments |
| Odyssey / Tyler Technologies | 25 MB | Most common state court portal limit |
| California eCourt | 25 MB | Varies by county; some allow 35 MB |
| New York NYSCEF | 25 MB | Per filing component |
| Texas eFile | 25 MB | Per document in the lead filing |
| Florida ePortal | 25 MB | Per document submission |
Always verify the current limit in your court's e-filing portal — limits change as courts upgrade their systems.
5-Step Process for Reducing PDF Size Before E-Filing
Identify Which PDFs Exceed the Limit
In File Explorer (Windows) or Finder (macOS), sort your exhibit files by size. Any file larger than your court's cap needs compression before stamping. The most common offenders are scanned exhibits, where each page is stored as a full-resolution image — even a 10-page document can exceed 25 MB if scanned at 600 DPI.
Compress Using a Free Tool
Visit iLovePDF.com, click "Compress PDF," upload the oversized file, and choose "Recommended" compression. Download the compressed file. The site shows the size reduction before you download — if the result is still too large, try the "Extreme Compression" option. Smallpdf.com and Adobe's free online compressor are equally reliable alternatives. No account or software installation is required for any of these tools.
Verify Legibility After Compression
Open the compressed PDF and zoom in to 100% on pages with small print, handwritten notes, or signatures. Courts expect exhibits to be clearly readable. If compression introduced blurring or pixelation, use a lighter compression setting. As a rule of thumb, aim for at least 150 DPI visual quality for typewritten documents and 200 DPI for handwritten documents or those with fine printed text.
Upload the Compressed PDF to ExhibitPrep
Once the PDF is within the filing limit, upload it to ExhibitPrep. Select your exhibit stamp template and position the stamp. The ExhibitPrep stamping engine adds the exhibit label as a vector text element — not a rasterized image — so the size increase is minimal. A 9 MB compressed PDF typically becomes 9.3–9.5 MB after stamping.
Verify Final Size and Download
After downloading the stamped PDF, check its final size in your file explorer. If it is still over the limit by a small amount, run it through the compression tool one more time at a slightly higher compression setting — the exhibit stamp text will survive additional compression cleanly. Download and you are ready to e-file.
Stamp compressed exhibits without ballooning file size
ExhibitPrep's stamping adds less than 5% to your PDF. Compress first, then stamp — and stay within your court's e-filing cap.
Compression Tool Comparison
iLovePDF
ilovepdf.com/compress_pdf
Best for: Scanned PDFs with many images
Pros
3 compression levels
Shows output size preview
Batch compression (up to 5 free)
Limits
Requires internet connection
5 tasks/hour on free plan
Smallpdf
smallpdf.com/compress-pdf
Best for: Native digital PDFs
Pros
Strong compression algorithm
Simple drag-and-drop
Shows percentage reduction
Limits
2 tasks/hour on free plan
Files deleted after 1 hour
Adobe Online
acrobat.adobe.com
Best for: PDFs with embedded fonts
Pros
Adobe-quality compression
Preserves form fields
Trusted by legal professionals
Limits
Requires free Adobe account
One file at a time on free tier
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Frequently Asked Questions
How much does exhibit stamping increase PDF file size?
Stamping a PDF with ExhibitPrep typically adds less than 5% to the file size. A 10 MB scanned PDF becomes approximately 10.4 MB after stamping. This is because the stamp is added as a small vector text element — it does not re-encode or recompress the existing page content. If you need to stay under a strict file size cap, compress first, then stamp, so the stamp's overhead is applied to the already-compressed file.
What are the best free tools to compress a PDF?
Three free browser-based tools work well for legal documents. iLovePDF (ilovepdf.com/compress_pdf) offers three compression levels and preserves text clarity well. Smallpdf (smallpdf.com/compress-pdf) uses strong algorithms and shows before/after file size. Adobe's free online compressor (acrobat.adobe.com) is reliable for native digital PDFs. For maximum control, Adobe Acrobat Pro's PDF Optimizer lets you set per-image DPI targets and choose which compression algorithm to apply per image type.
What are typical court e-filing file size limits?
E-filing size limits vary widely by court and filing system. Federal courts using CM/ECF typically cap individual documents at 10 MB. State courts using Tyler Technologies' Odyssey portal commonly allow 25 MB per document. Some state-specific portals allow 35 MB or more. California's eCourt systems generally allow 25 MB per document. Always verify the current limit in your court's e-filing portal help section or local rules — these limits change as courts upgrade their systems.
Can I split a large exhibit into smaller parts instead of compressing?
Yes, splitting is a legitimate alternative when compression would reduce quality below acceptable levels. Split the exhibit into logical parts (e.g., "Exhibit A, Part 1 of 2" and "Exhibit A, Part 2 of 2") and stamp each part as a separate exhibit or with a part notation. iLovePDF and Smallpdf both offer free PDF split tools. Some courts also accept a ZIP archive of multiple exhibits in place of a single large PDF — check your court's e-filing instructions.
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