How we test what we claim

Every compatibility claim on this site comes from a test run we repeat before each release, on a fixed sample of public pins we own or that are openly licensed. This page describes the sample, the pass criteria and the failures we have not solved — so a reader can check the claims instead of trusting them.

The sample

The fixed set covers each format at least three times, from different accounts and upload dates, because Pinterest’s encoding pipeline changed several times and older pins carry different structures:

We do not test against private pins belonging to other people, and we do not test against content we have no rights to.

What counts as a pass

A case passes only when all four hold:

A 1 KB .m3u8, a silent file whose source has audio, or a resolution below what was chosen — all failures, even when the download itself "succeeded".

Known failures, unresolved

Listed here rather than hidden, because they are exactly what a reader needs to decide whether this tool fits:

Open issues
CaseStatusWhy
Private pins on the websiteWill not fixA server has no session; the extension covers it
Region-restricted pinsOpenThe CDN refuses from some regions; no workaround that is not evasion
Deleted pinsWill not fixThe media is gone
4K outputWill not fixPinterest stores no 4K variant for pins
Removing a burned-in watermarkWill not fixIt would mean altering the video and erasing attribution
Firefox / Safari extensionPlannedDifferent extension format; not started

How often this is refreshed

Before every extension release, and at least once a quarter regardless. The date at the top of each page is the last time the claims on that page were re-verified — not the date the file was rebuilt.

When a result changes, the table changes with it and the change is written down in the changelog. We do not silently correct a claim.

We are not affiliated with, sponsored or endorsed by Pinterest. Only download content you own, that is openly licensed, or that you have permission to use. · PinCrate