If you're reading this, something online probably matters to your case right now — a listing, a post, a review, a message thread, a landlord's ad — and you're worried it will be edited or deleted. The single most important rule: capture it now. Posts can be deleted, listings taken down, and pages quietly edited in seconds, and no tool can capture what's already gone. Get a preservation copy first; sort out the finer points after.
Then make the copy one a court can actually use. Here's what that takes.
A tightly cropped screenshot is easy to challenge because it strips out context. Capture the full page, including the address bar or URL, the date, usernames or account handles, and the surrounding content that shows what the page is. If the material spans multiple screens, capture all of it — a full-page capture beats a stack of partial ones.
To be admitted, evidence has to be authenticated — under Federal Rule of Evidence 901(a), the person offering it must produce "evidence sufficient to support a finding that the item is what the proponent claims it is." (State rules are generally similar; check yours.) The most common route is simple testimony from someone with knowledge — you, saying when you visited the page, what you saw, and how you saved it (Rule 901(b)(1)). So write it down at capture time: the exact URL, the date and time (note your time zone), the device and browser, and what you did. A contemporaneous note beats memory at a hearing months later.
Save the original capture file and don't edit it — no annotations, no re-saves through an image editor. If you need to mark it up, work on a copy.
In plain terms: if your capture has a cryptographic hash (such as SHA-256) recorded at capture time, anyone can later recompute the hash and confirm the file hasn't been altered since. That doesn't make the capture automatically admissible, but it directly answers the most common attack on screenshots — "how do we know this wasn't doctored?"
Platforms delete content on their own schedules, users delete their own posts, and edit features rewrite history. The Wayback Machine is a genuinely useful free option — you can request an on-demand snapshot of many public pages, and the Internet Archive even offers a affidavit service for authenticating its records in litigation. Its limits: it only has what was archived, some pages block archiving or render incompletely, and dynamic or login-walled content often doesn't capture. If the page matters, make your own timestamped copy too.
Honesty matters more than sales copy here, so: no screenshot tool, ours included, can guarantee a court will admit your capture. Admissibility is decided by the judge under the rules of your jurisdiction, and authentication is only one hurdle — hearsay, relevance, and completeness objections exist too. Private content behind a login (DMs, private groups, text messages) can't be captured by third-party webpage tools at all; for texts, photograph or screen-record the thread on the device and keep the device. And if the stakes are high — serious litigation, criminal matters — talk to a lawyer about formal forensic collection and preservation letters. For small claims and informal proceedings, judges are typically more flexible, but a well-documented capture still beats a bare screenshot.
This is general information, not legal advice, and admissibility is always decided by the court under the rules of your jurisdiction. ProofSnap preserves public webpages with a timestamp and integrity hash; it does not and cannot guarantee that any capture will be admitted as evidence. Sources: Fed. R. Evid. 901 and Fed. R. Evid. 902(13)–(14) (Cornell LII); Internet Archive legal/affidavit information.