Free tools for short-form video
Small, fast tools for the fiddly parts of making clips for TikTok, Reels and YouTube Shorts. Most run entirely in your browser, all of them are free, and none needs an account. The AI writers are rate limited to keep them that way.
- Caption generatorPaste a transcript or script and get short-form caption lines for TikTok, Reels and Shorts, with a live animated preview and free SRT and VTT downloads. No sign-in.Open the tool →
- Aspect ratio and safe-zone calculatorExact pixel sizes and UI safe zones for YouTube Shorts, Instagram Reels, TikTok, LinkedIn and X, plus a crop calculator and ffmpeg command for turning 16:9 video into 9:16.Open the tool →
- Hook line generatorPaste a paragraph from your video or script and get 5 opening hook lines for TikTok, Reels and Shorts, written by AI. Free, no sign-in.Open the tool →
- SRT to VTT converterConvert subtitles between SRT and WebVTT and shift every caption earlier or later by any number of seconds. Runs in your browser, no upload, no sign-in.Open the tool →
- YouTube title and description generatorPaste what your clip says and get 5 YouTube title ideas, a description and hashtags, written by AI from your own words. Free, no sign-in.Open the tool →
- Hashtag suggesterDescribe your video and get relevant hashtags grouped for TikTok, Instagram Reels, YouTube Shorts or LinkedIn, with no spam tags. Free AI tool, no sign-in.Open the tool →
- Video length and reading-speed calculatorFind out how long your script runs at your speaking pace, how many words fit a 15, 30 or 60-second clip, and whether your captions are too fast to read.Open the tool →
- Thumbnail and cover safe-area checkerCheck your video cover or thumbnail against the UI safe zones and grid crops of YouTube Shorts, Instagram Reels, TikTok, LinkedIn and YouTube. Your image never leaves your browser.Open the tool →