Blog
The Auto Captions blog
Practical articles on captions and subtitles, written by the people who build the tool. Formats, readability, and step-by-step help for the apps you already use.
Captioning for real viewers
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Video Captioning: A Practical Guide to Accessible Captions
Video captioning done right: what good captions include, what WCAG asks for, how auto captions fit in, and a checklist to caption your next video. -
Whisper AI Transcription: How Accurate Is It for Captions?
How Whisper AI transcription works, where it gets captions wrong, what word-level timestamps are, and how to check and fix auto captions quickly. -
How to Add Captions to Video on iPhone for Free
How to add captions to video on iPhone for free: iMovie titles, captions inside TikTok or Instagram, or auto captions in Safari saved as an MP4. -
How to Add Captions to Facebook Video: 3 Ways
How to add captions to Facebook video: turn on auto captions, upload an SRT file with the right name, or burn captions in so they show everywhere. -
Zoom Closed Captions: Live Captions and Recordings
How Zoom closed captions work in meetings, how to turn them on as host or attendee, and how to add captions to a Zoom recording after the call.
Make subtitles easy to read
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Subtitle Guidelines: Line Length, Reading Speed and Timing
Subtitle guidelines that pro captioners follow: characters per line, reading speed, minimum duration, line breaks and when to split a subtitle. -
Best Font for Subtitles: 8 Readable Picks and Why
The best font for subtitles is plain, wide and sans serif. Eight readable picks, the right subtitle font size, and outline and box settings that work. -
Subtitle Position: Where to Place Captions on Any Video
Where subtitle position works best on widescreen, vertical and square video, how to keep captions clear of platform buttons, and which colors read best. -
Subtitles Out of Sync? How to Fix Subtitle Timing
Subtitles out of sync with the audio? Find out whether it is an offset, a drift or a frame rate mismatch, then fix the subtitle timing for good.
Files, players and editors
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Subtitle Formats Explained: SRT, VTT, ASS, SBV and More
Subtitle formats compared: what SRT, VTT, ASS, SBV, SCC and TTML files are for, which platforms accept each one, and how to convert between them. -
What Is a VTT File? WebVTT Explained with Examples
What a VTT file is, how WebVTT cues, settings and styling work, how to open one, and how to make a VTT file for your own video in a few minutes. -
VLC Subtitles: Add, Sync and Fix Subtitles in VLC
How to use VLC subtitles: load an SRT file, fix subtitles that are out of sync with the delay keys, change the size and font, and fix missing ones. -
How to Add Subtitles in iMovie on Mac and iPhone
How to add subtitles in iMovie with titles on Mac, iPhone and iPad, why it is slow for long videos, and a faster way to get timed captions in. -
How to Add Subtitles in DaVinci Resolve (Free and Studio)
How to add subtitles in DaVinci Resolve: import an SRT, create a subtitle track by hand, style it, and export captions burned in or as a file. -
Final Cut Pro Captions: Generate, Import and Export
How Final Cut Pro captions work: generate captions from speech, import an SRT, edit caption roles, and export them as a file or burned into the video.
Looking for shorter answers? The caption and subtitle guides cover the basics, and all tools lists every free captioning tool on the site.