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Tool · Edit
Add Subtitles to Video
Burn SRT subtitles directly into your video. Captions become part of the frames — they play everywhere, with no player support needed.
Drop a video here
MP4, WebM, MOV, MKV — anything your browser can decode.
PRIVATE BY DESIGN — PRIVATE BY DESIGN — decoding, processing and encoding all run in your browser's engine. No server sees your file.
How to Add Subtitles to a Video
Drop your video, load an SRT subtitle file, pick a text size, and export. The subtitles are burned into the pixels — done entirely in your browser, no upload.
Tip: SRT is the plain-text subtitle format exported by YouTube, CapCut and most editors — if your captions aren't SRT yet, export them as SRT first.
PLATFORM GUIDE
Subtitles for your platform
TikTok
Burned-in captions always show, even with sound off — many viewers scroll muted, so captions keep the message visible.
Instagram Reels
Reels autoplay muted in the feed. Permanent captions grab attention before viewers turn the sound on.
YouTube
Burned-in captions need no CC toggle and survive any re-upload or download — ideal for Shorts.
FAQ
Frequently asked questions
Is Add Subtitles to Video really free?
Yes — completely free, with no hidden fees, no premium tier and no signup required. The tool runs entirely in your browser.
Do I need to install anything to use Add Subtitles to Video?
No. Add Subtitles to Video works directly in your browser. There is no software to install, no app to download and no plugin required.
Is my video uploaded to a server when I use Add Subtitles to Video?
Never. All processing happens locally on your device. Your file never leaves your computer, which is why there is no upload wait and no privacy risk.
Which video formats does Add Subtitles to Video support?
Subtitles are burned permanently into a standard H.264 MP4 — captions show on any player, even ones without subtitle support.
What happens to my file after processing?
Nothing is stored anywhere. Once you close the tab, everything is gone. We have no server, no storage and no access to your files.
Will my video have a watermark?
No — every download is 100% watermark-free. EditVideo never adds logos, branding or watermarks to your files.
Can I add subtitles to a video for free without a watermark?
Yes — subtitles are burned into your video locally in the browser. EditVideo never adds a watermark, ever.
Which subtitle file formats can I upload?
SRT (SubRip, .srt) — the universal plain-text subtitle format. YouTube, CapCut and most editors export SRT directly, so export from there if your file is in another format.
Can I add subtitles to a video on my phone?
Yes — it works in any modern mobile browser. Videos and SRT files from your phone's files app drop right in.
Can I edit the subtitles after they're burned in?
No — burned-in captions are permanent, which is exactly why they play everywhere. For editable subtitles, generate an SRT with our Auto Subtitles tool first, edit it, then burn the final version.