Free tools for YouTube creators
Quick checks before you publish, built on YouTube Help’s own rules. They all run in your browser, so nothing you paste or pick is uploaded.
Want the limits themselves? Every YouTube spec on one page, quoted from YouTube Help.
YouTube chapters checker
Paste your description. See which of YouTube’s chapter rules pass, and copy a fixed timestamp list.
YouTube thumbnail preview
See your thumbnail and title in a home feed, search results and an up-next list, in light and dark, with a size check.
YouTube title and description checker
Count your title and description against YouTube’s 100 and 5,000 character limits, and catch broken or too many hashtags.
Caption file converter: SRT, VTT, SBV
Convert captions between SRT, VTT and SBV, shift every timing to fix sync, and catch overlaps and broken lines. Saves plain UTF-8, the way YouTube asks.
YouTube upload checker: video or Short?
Drop a video to see whether YouTube takes it and as what: a Short (3 minutes, square or vertical) or a regular video, plus the 256 GB, 12-hour and 15-minute limits.
YouTube export size calculator
See how big your export will be at YouTube’s recommended bitrate for its resolution and frame rate, SDR or HDR, and how long it takes to upload.
Want the whole video edited?
See YouTube video editingYouTube videos from $49Shorts from $29See pricing