Drop a video file and see its resolution, duration, size and bitrate checked against recommended upload specs per platform — before a failed upload wastes your evening. Runs entirely in your browser; the file never leaves your machine.
The deeper problem isn't specs — it's that most schedulers re-encode your video after you upload it, whatever shape it's in. Smart Post Studio publishes from your desktop with no re-encode: 4K stays 4K. We documented the difference: see the evidence.
Try the free planWhat this checks — and what it can't. The checks compare your file against widely documented recommended upload specs as of September 2026: vertical platforms (TikTok, Reels, Shorts, Stories) want 9:16 at 1080 × 1920 or better; X caps uploads at 512 MB; feed video reads best at 1080p+; and visibly low bitrates (under ~4 Mbps at 1080p) tend to look soft after every platform's own re-encode. Platforms change limits without notice and some caps vary by account type, so treat a ⚠ as "check before you rely on it," not a verdict. Analysis uses your browser's own video decoder — nothing is uploaded or stored.
More free tools: smartpoststudio.com/tools · verified sizes: image-size reference