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Video Tools3 formats supported

Free online caption burner

Use this free online caption burner to add captions or subtitles directly into video files in your browser without uploading them to a remote service.

  • Upload SRT or VTT subtitle files
  • Custom text captions with position and style
  • Adjust font size, color, and background

Supported formats

MP4WebMMOV

Set caption and export options

Choose how captions should appear, then render them into the video.

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Drag & drop Burn Captions

or click to browse

Supported: MP4, WebM, MOV

How It Works

A simple three-step flow from upload to download.

  1. 1

    Upload a video and a subtitle file (SRT/VTT) or enter custom text.

  2. 2

    Customize the caption appearance and position.

  3. 3

    Burn captions into the video and download.

Features

Key capabilities surfaced as quick-scan cards.

  • Upload SRT or VTT subtitle files

  • Custom text captions with position and style

  • Adjust font size, color, and background

  • Preview captions before burning

Related Tools

Nearby workflows people often use before or after this video tool.

Video Converter

MP4 · WebM · AVI

Convert videos between MP4, WebM, AVI, MOV, MKV, and more with quality control.

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Video Trimmer

MP4 · WebM · MOV

Cut and trim video segments with precise start and end time controls.

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Video Compressor

MP4 · WebM

Reduce video file size without significant quality loss using CRF optimization.

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Mute Video

MP4 · WebM

Remove the audio track from a video without re-encoding. Fast stream-copy output.

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How to burn captions into a video online

  1. 1

    Upload your video

    Choose a video from your device or drag it into the caption tool. Common formats like MP4, MOV, and WebM are supported.

  2. 2

    Add or configure the captions

    Set the subtitle or caption content and make sure it appears the way you want before export. This is useful when you need always-visible captions that stay part of the video itself.

  3. 3

    Burn the captions and download

    Process the video and download the captioned result when it is ready. The workflow runs in your browser, so you can add captions to video without uploading the file to a remote service.

Understanding the settings

Burned captions become part of the video frame, which makes them useful when you want guaranteed visibility across players and platforms. This is different from optional subtitle tracks that viewers can turn on or off. Hardcoded captions are especially useful for social clips, previews, and situations where you do not want subtitle support to depend on the playback app.

Compatibility, privacy, and limitations

Browser and device support

These tools are designed for modern browsers. Actual speed and maximum practical file size depend on device memory, processor speed, and how much media your browser can safely keep in memory during processing.

Format safety

If you are unsure which output to choose, start with broadly compatible formats such as MP4, WebM, MOV. They are usually the safest fallback for everyday sharing and playback.

Privacy explanation

This media job runs locally in your browser, which is useful for personal recordings, internal assets, and other files you would rather not send through a remote upload service for a routine edit.

Things to keep in mind

  • Very large files can take longer to inspect and process because browsers have less memory headroom than native desktop editors.
  • FFmpeg-based browser processing is flexible, but long or high-resolution media can still be slower than a native desktop workflow.

Frequently asked questions