Social media file checker

Catch an awkward crop or oversized image before you upload. Inspect exact dimensions and bytes locally, then compare selected platform recommendations with clear matches, review points and unknowns.

No image or video yet

Drop an image or video hereAdd an image or video

JPG, PNG or still WebP up to 20 MiB, or MP4, MOV or WebM up to 150 MiB and 60 minutes. Your file stays on this device.

Destination

Instagram organic photoPhoto ratio and widthPinterest standard image Pin2:3 ratio, format and 20 MB limitLinkedIn single image adFormat, 5 MB limit and ad ratioYouTube video thumbnail, mobile upload16:9, width and 2 MB limitYouTube video thumbnail, desktop upload16:9, width and 50 MB limitTikTok vertical Non-Spark video ad9:16 and minimum size

Guidance checked 15 October 2026: Instagram organic photo guidance. Matching every check does not mean a platform will accept the file. Account, API and moderation rules are not tested.

How to use it

1
Drop an image or a video your browser can play onto the checker, choose one from your device or paste it. Nothing is uploaded.
2
Read its exact dimensions, ratio, size and format, and see at a glance which destinations it matches.
3
Choose a destination to see each check. Where something needs a look, follow the link to the resizer or compressor to prepare a new copy; your original file is never changed.

Before you export

Image format is identified from file bytes, not its extension. Browser-decoded dimensions include supported orientation metadata. Video container detection does not identify its internal codec, bitrate or frame rate.

A recommendation match does not guarantee acceptance. This checker has its own smaller browser memory limits and does not fetch account data, test a publishing API or upload your media.

Sources and format guidance

Your inputs stay in this browser. These tools work without an account. The content editor opens separately; your files are not transferred automatically.

Open-source library notices