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Best times to post on Pinterest: Evenings 8–11pm, when planning and browsing peaks. Free reference based on typical audience activity, no login.
Check your caption against Pinterest's 800-character limit in real time. Free, nothing leaves your browser.
Shrink a video's file size for Pinterest (max not publicly documented) right in your browser. Free, no login, no upload.
Crop and scale any video to Pinterest's 9:16 frame (1080×1920) in your browser. Free, no upload.
GIF is not listed in Pinterest's current organic Pin upload specifications.
Partially - MOV works from the Pinterest app, but not on the web uploader.
No - WebM isn't in Pinterest's accepted list on either the app or the web.
Crop and scale any image to Pinterest's ideal 1080×1920 dimensions in your browser. Free, no upload.
Pinterest safe zone: top 12%, bottom 12%, sides 5% covered by the app's own interface. Free, nothing is uploaded.
Pinterest spec at a glance: 1080 x 1920px, 9:16 aspect ratio, 4 seconds to 5 minutes for an organic Video Pin, not publicly documented, 800-character caption limit. Free, no login.
Keep the first 300 seconds of a video for Pinterest. Review the destination limits before posting. Free, no upload.
Measure a local video's duration for Pinterest. 4 seconds to 5 minutes for an organic Video Pin. Runs in your browser; no upload.
Render the complete min/max waveform of a 16-bit PCM WAV, showing channels, duration and sample peak. No LUFS or true-peak claim.
Answer-first troubleshooting for the problems that come up when publishing short-form video: uploads that fail, blurry exports, cropped frames, oversized files and format errors - compare likely causes, check what can be measured and find a relevant tool.
Yes - LinkedIn lists AVI for organic video on desktop, iOS and Android. Check the upload surface first, then the actual codec, duration and file size. This compatibility record does not diagnose your particular file.
AVI is not listed for TikTok Content Posting API uploads. Check the upload surface first, then the actual codec, duration and file size. This compatibility record does not diagnose your particular file.
Yes - AVI is listed among YouTube supported upload formats. Check the upload surface first, then the actual codec, duration and file size. This compatibility record does not diagnose your particular file.
Choose a ratio for the actual placement and composition. LinkedIn’s organic upload guide permits a range from 1:2.4 to 2.4:1, including square, landscape and portrait. This dataset does not establish a universally best ratio or your audience’s device mix.
1080×1920 is a practical 9:16 editing target, not a universal best resolution or an eligibility requirement. Keep useful source detail and avoid upscaling a low-resolution clip. Shorts also accepts eligible square videos.
MP4 is a documented option for organic LinkedIn video on desktop, iOS and Android. This is a compatibility-oriented default, not a proven best format across ads and every publishing surface. A listed extension can still contain an unsuitable codec.
MP4 is listed for organic Video Pins on both web and mobile, making it a practical choice when switching upload surfaces. MOV is listed for the app only. Supported formats do not guarantee identical processing or visual quality.
For TikTok’s Content Posting API, MP4 with H.264 is the documented recommendation. AAC is this tool’s audio export choice, not an API requirement established by that source. Native composers may differ; no format guarantees acceptance.
MP4 with H.264 and AAC is a practical export choice consistent with YouTube’s encoding guidance. It is not the only supported combination. Shorts eligibility also depends on shape and duration, not the container alone.
Check whether the bars are already visible in the original file or are added by the player. Exported bars require editing the source canvas; player padding depends on its frame. Cropping removes content, so keep a copy of the original.
This site’s converter re-encodes video, which can lose detail. Compare the output dimensions and the same frame with the original. A container-only remux in another tool can preserve streams, so changing file format does not always mean re-encoding.
Use an encoder that keeps the original frame size while changing quality. Koldflux’s browser compressor uses bounding-box presets and may resize or round dimensions to even numbers; it cannot guarantee unchanged dimensions for every source.
A quality-based encoder does not target an exact file size. Re-encoding an already efficient source can produce a larger file. Compare the output size and quality with the original, and retain the original if the result is worse.
GIF is not a supported video input for the TikTok Content Posting API. Check the upload surface first, then the actual codec, duration and file size. This compatibility record does not diagnose your particular file.
No - YouTube doesn't accept a .gif file as a video upload. Check the upload surface first, then the actual codec, duration and file size. This compatibility record does not diagnose your particular file.
Yes - LinkedIn documents MOV for organic video on desktop, iOS and Android. Check the upload surface first, then the actual codec, duration and file size. This compatibility record does not diagnose your particular file.
Partially - MOV works from the Pinterest app, but not on the web uploader. Check the upload surface first, then the actual codec, duration and file size. This compatibility record does not diagnose your particular file.
Yes - TikTok documents MOV uploads through its Content Posting API. Check the upload surface first, then the actual codec, duration and file size. This compatibility record does not diagnose your particular file.
Yes in X Media Studio - MOV support in other X upload surfaces is not established here. Check the upload surface first, then the actual codec, duration and file size. This compatibility record does not diagnose your particular file.
Yes - YouTube (and Shorts) accepts MOV uploads directly. Check the upload surface first, then the actual codec, duration and file size. This compatibility record does not diagnose your particular file.
An .mp4 filename does not identify its codecs. Test playback in another player and inspect the actual streams in an editor. A browser playback failure alone does not prove corruption or upload incompatibility.
Two likely causes: the conversion tool copied only the video stream and dropped audio, or the target container needs a specific audio codec (WebM needs Opus or Vorbis, not AAC/MP3) that wasn't used.
If you only muted a player, unmute it. If you exported with this site’s mute tool, the output has no audio stream; recover sound from the original or an earlier project version. Other editors may retain a disabled track.
Lossy re-encoding can reduce file size but cannot promise unchanged quality. Compare a short sample at your intended viewing size, keeping dimensions where useful. Choose a smaller preset only if the loss of detail is acceptable.
Compare the original export with the Instagram playback view. Interface overlays may cover text; a crop can remove it. Our safe-zone percentages are approximate editing guides, not verified margins for every device and placement.
Compare the original export with the TikTok playback view. Interface overlays may cover text; a crop can remove it. Our safe-zone percentages are approximate editing guides, not verified margins for every device and placement.
Compare the original cover with the specific placement preview. A thumbnail, feed card and profile grid can use different framing. Check that placement’s aspect ratio and crop preview rather than assuming one exact size prevents every crop.
An unsupported-format error may refer to the internal container, codec or upload surface. The filename extension alone cannot distinguish these. Check the scoped requirements, then test a fresh export from the original if needed.
Compare the video shape with the player area. A 9:16 video fits a 9:16 frame; phones and players can have other proportions. Choose between padding and cropping based on what must remain visible.
Compare the local original and the uploaded version at the same viewing size and playback quality. Wait for processing to finish. This separates source problems from a lower-quality playback rendition before you decide to re-export.
Unmute the LinkedIn player and check device volume, then compare with the local original. If sound returns, the player was muted. If it stays silent, inspect the source or export; autoplay does not prove the audio track is intact.
Unmute the X player and check device volume, then compare with the local original. Playback settings vary. If the original has sound but the uploaded version does not, inspect processing or export settings instead of assuming muted autoplay.
Confirm the limit shown by your current Instagram composer. The approximately 4 GB value in our reference data is not reverified for every surface. If size is the stated error, export a smaller copy locally; our browser compressor accepts inputs only up to 100 MB.
LinkedIn caps organic video at 5 GB. If your file is under that and still rejected, check duration (15 minutes) before assuming it's a size problem.
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