What is the PDF size limit for CM/ECF?

There is no national limit, and that is the problem

Every federal court runs its own installation of CM/ECF, and each one sets its own maximum PDF size. Ask PACER directly whether there is a limit and the answer is that it depends on the court, followed by a pointer to the Court CM/ECF Lookup tool.

So the official guidance is: go and check, one court at a time. That is a reasonable position for PACER to take and a miserable one to be on the receiving end of at half past four on a filing deadline.

First, the thing that cost us a week

An earlier version of this page read every limit from the obvious places — each court's FAQ, news post or user manual. Those are the pages you find when you search, and they are what every other site quotes.

We re-checked all of them a week later against each court's live filing system. Seven of twenty-three were wrong:

Every one of those guidance pages is still live today. The District of Massachusetts publishes both figures simultaneously: its CM/ECF FAQ states that "Each PDF document may not exceed 7 MB in size", while its own filing system reports a maximum of 50.0 MB.

Both pages belong to the same court. Only one of them rejects your upload.

Where the real number lives

Every district's CM/ECF has a Court Information page, and it states the enforced limit outright:

https://ecf.DISTRICT.uscourts.gov/cgi-bin/CourtInfo.pl

Replace DISTRICT with the court's code — mad, nysd, cand, txsd and so on. It is public, it needs no PACER login, and it says Maximum PDF File Size in plain text near the top.

That page is the system talking about itself, so it cannot drift out of date the way a PDF manual from 2023 can. As far as we can find, nobody has written this down, which is why so much of the published advice about CM/ECF limits is quietly years old.

The limits

Read from each court's live Court Information page on 11 September 2026. Every source is linked at the foot of this page.

Limits change. Before you rely on one of these for a filing, open the linked page and read it yourself — it takes about ten seconds, and the court's system is authoritative in a way this page is not.

What the spread actually means

The range is 15 MB to 100 MB, a factor of nearly seven, across eight distinct values. The same 40 MB exhibit bundle is unremarkable in Seattle, comfortable in Boston, and needs dividing in Des Moines.

And the limit has nothing to do with how busy the court is. The Southern District of New York handles some of the largest commercial litigation in the world and sits second from the bottom of this table at 15.1 MB — an oddly precise figure that is itself a good sign you are reading a machine rather than a press release. If you practise in more than one district, the number you have memorised is probably wrong somewhere.

The courts that "will not tell you" — and do

Two districts are widely described, including by an earlier version of this page, as declining to publish a figure. The District of New Jersey's own filing guide says the system will not accept documents "larger than what is listed on the Court Information link on the ECF login page" and leaves it there. The Southern District of Texas acknowledges in its FAQ that a procedural order sets a limit, without saying what it is.

Both of them do publish the number. It is on the Court Information page — in New Jersey's case, on precisely the page its own guide tells you to go and look at. New Jersey allows 50.0 MB; Southern Texas allows 35 MB.

Anyone quoting "10 MB for the District of New Jersey" is repeating a figure that court does not publish anywhere.

The exact error, and a trap most guidance misses

Two courts publish their rejection message word for word, which is useful because that is what people paste into a search box at eleven at night:

"You cannot load this file because it is over 50 Megabytes (MB)." (S.D. Florida)

"You cannot load this file, it is over 40 MB." (E.D. New York)

And the trap: some courts cap the whole filing as well as each document. The Eastern District of Virginia has published a per-filing ceiling covering attachments, separate from the per-document limit. Note that the same guide states a per-document figure its live system contradicts, so treat its per-filing number as needing confirmation too — but the shape of the rule is real, and splitting an oversized document into four compliant parts can still put you over a ceiling you did not know existed.

Compress first. Split only if you have to

A single document is easier for a clerk and a judge to work with than four volumes, so reducing the file is the better outcome where it is available.

The catch specific to court work is that a filing has to stay legible, and compressing a scan hard enough to hit an aggressive target is exactly how text stops being legible. Scanned exhibits are the usual offender: a page photographed in colour can be many times the size of the same page scanned properly in black and white, at no benefit to anyone reading it.

If the document is still over the limit at a resolution you would be comfortable defending, then split it - and split it by size rather than by page count, because page count tells you nothing about bytes. A single photographic exhibit page can outweigh fifty pages of brief.

Practical notes

• Check the Court Information page first, not the FAQ. It takes ten seconds and it is the only figure that cannot be stale.
• Label the volumes. Most courts expect something like Volume 1 of 4 in the docket text, and many want a caption page on each part.
• Ask the clerk if you are unsure. It is a two-minute call and much cheaper than a rejected filing.
• The limit is usually per document, not per filing. Several courts state explicitly that the cap applies to each individual component, so a motion with three exhibits is four separate files each measured on its own. Check the wording for your court, because this is not universal.
• This page is not legal advice, and it is not authoritative. It is a set of figures read from public court systems on a stated date, with every source linked so you can check them yourself in seconds.