Tools for YouTube creators
Check your upload before YouTube does.
Free tools for the technical side of publishing to YouTube, built with the same care as broadcast delivery checks. Drop in your export and get an exact answer, not a rule of thumb. Everything runs in your browser: no sign-up, nothing uploaded, nothing stored.
Caption reading speed
- YouTube
Drop in your captions (.sbv, .srt or .vtt) and see which lines go by too fast to read, when they appear, and how to fix each one.
Open →PictureColour tag checker
- YouTube
- Shorts
- Reels
- TikTok
Why an export looks washed out: its colour tags in the container and the bitstream, how Chrome, Safari and QuickTime show it (measured), and the setting that fixes it.
Open →TimingMid-roll ad break finder
- YouTube
Drop in your video and get mid-roll ad break times at natural pauses, at the spacing you choose, preferring your chapter starts. Nothing uploaded.
Open →AudioMono compatibility checker
- YouTube
- Shorts
- Reels
- TikTok
- Podcasts
- Audiobooks
Fold a stereo mix to mono and see what it loses, second by second: phase correlation, the worst sections, and dual-mono, one-sided or inverted channels, with the fix.
Open →PictureShorts safe zones & thumbnails
- YouTube
- Shorts
Where Shorts buttons and titles cover the picture (measured, with a transparent overlay to download), and a thumbnail check against YouTube’s requirements.
Open →DeliveryTitle, description & tag checker
- YouTube
Title, description and tags against YouTube’s limits, counted the way YouTube counts them, with a preview of where the title gets cut off in search.
Open →DeliveryUpload time & size
- YouTube
How big your upload will be and how long it takes on your connection: at YouTube’s recommended bitrate, your own export, or ProRes. Or drop the file itself.
Open →DeliveryVideo podcast checker
- YouTube
- Podcasts
One video episode against Spotify’s video specs and YouTube’s upload settings side by side: keyframes, interlacing, A/V length, edit lists, codecs.
Open →TimingYouTube chapter checker & builder
- YouTube
Find the line that stops YouTube showing your chapters, or build a correct chapter list from Final Cut, Resolve or Premiere markers.
Open →AudioYouTube loudness checker
- YouTube
Drop in a video or audio export: integrated LUFS and true peak per BS.1770, and how much YouTube will turn it down (or why it will play quiet). Nothing uploaded.
Open →DeliveryYouTube upload checker
- YouTube
Drop your export and check it against YouTube’s recommended upload settings: Fast Start, edit lists, H.264 profile and GOP, interlacing, bitrate, colour and audio.
Open →Measurements follow the published standards each tool names. Where a figure is YouTube’s, it comes from YouTube’s own documentation, and where YouTube hasn’t published one, the tool says so and tells you where the number comes from instead.
Posting the same video to Reels and TikTok? Tools for Shorts, Reels and TikTok. Or see all tools for creators. Delivering to a broadcaster instead? Broadcast, streaming & post tools.