Add Subtitles to Video Free, Without Watermark
Clean MP4 out, no logo stamped on it, no account, no trial.
Tested up to a 20-minute 1080p video (1.2 GB) in desktop Chrome. Processing takes about half the video's length for 1080p. Phones: keep to short clips.
Add a video
How to add Subtitles to Video Free, Without Watermark
- Choose your video.
- Add an SRT/VTT file or type the subtitles.
- Style them and press Burn subtitles.
- Download the MP4, with no watermark.
No watermark, no sign-up, no login, no trial. Add your subtitles, download a clean MP4. The tool runs in your browser, so there is no server cost to pass on and no reason to stamp a logo on your video.
Why other free tools add a watermark
Online editors upload and process your video on their servers, which costs them money, so the free plan carries a watermark or an export limit to push you to pay. This page does the work on your device instead, so it can stay free without either.
What you do give up
Processing on your device is slower than a server for long videos, and very large files can exceed what a browser tab can hold in memory. The limits below were measured on real files.
Tested limits
Measured in desktop Chrome on a recent Mac: a 20-minute 1080p video (1.2 GB) worked and took about 10 minutes; 1080p runs at roughly 2× real time and 720p about 4×. 4K works but is slow (a 30-second 4K clip took under 3 minutes). Phones have much less memory than computers: short clips of a few minutes are fine, long or 4K videos may fail. Files above 2 GB are not accepted.
- Chrome desktop (Mac)1080p, 20 min, 1.2 GB≈ 0.5× video length (1080p)
- Chrome desktop (Mac)720p, 10 min, 306 MB≈ 0.25× video length
- Chrome desktop (Mac)4K, 30 s, 132 MB≈ 5× video length
- Phone video (HEVC, vertical)1080×1920, 9 s, 19 MB16 s
FAQ
Is there a watermark or a sign-up?
No watermark, no account, no email. The MP4 you download contains your video and your subtitles, nothing else.
Is my video uploaded anywhere?
No. The video is processed by ffmpeg compiled to WebAssembly, running inside your browser tab. The file is never sent to a server, so it stays private and there is no upload wait. The only downloads are the page itself and the video engine (about 9 MB compressed, from the jsDelivr CDN).
Does the site use analytics or cookies?
Yes, basic usage analytics through Google Analytics 4. It records page views and anonymous steps, such as which style preset was chosen, ranges like video resolution, and whether a burn succeeded. It never receives your video, your subtitle text or any file name. The site is set up so that analytics cookies are not set for visitors in the European Economic Area, the United Kingdom and Switzerland. Elsewhere, Google Analytics may set cookies.
How big can the video be?
Measured in desktop Chrome on a recent Mac: a 20-minute 1080p video (1.2 GB) worked and took about 10 minutes; 1080p runs at roughly 2× real time and 720p about 4×. 4K works but is slow (a 30-second 4K clip took under 3 minutes). Phones have much less memory than computers: short clips of a few minutes are fine, long or 4K videos may fail. Files above 2 GB are not accepted.
Does it create subtitles automatically?
No. This tool burns subtitles you already have (an SRT or VTT file) or subtitles you type in. It does not listen to your audio. If you need a transcript first, export an SRT from your editor or captioning service and bring it here.
Which subtitle and video formats work?
Subtitles: SRT (.srt) and WebVTT (.vtt). You can also type subtitles directly on the page. Video: MP4 and MOV were tested, including H.264 and HEVC phone recordings; WebM and MKV are accepted too. The result is always an H.264 MP4 with AAC or the original audio, the format iPhone, Android, Instagram, TikTok and YouTube all accept.