Free tools
Free subtitle and caption tools
Free tools for subtitles and video captions that run in your browser: convert SRT and VTT files and check TikTok and Reels safe zones, without uploading anything.
SRT to VTT converter
Convert SRT subtitles to WebVTT in your browser. Paste or open a .srt file and download the .vtt in one click. No upload, no signup.
VTT to SRT converter
Convert WebVTT (.vtt) subtitles to SRT in your browser. Strips WebVTT-only styling and renumbers cues. No upload, no signup.
TikTok safe zone checker
See what TikTok's buttons and captions cover on a 1080×1920 video. Official margins, a free overlay PNG and a local preview of your frame. Nothing is uploaded.
Instagram Reels safe zone checker
Check your Reel against Meta's safe zone: 14% top, 35% bottom, 6% sides. Preview your frame locally and download a free 1080×1920 overlay PNG. No upload.