What can I do with Subtitle Merger?

Merge two overlapping SRT tracks into one sorted file. Subtitle Merger is part of the Subtitles shelf on utils.sbs and is designed for quick, one-off tasks.

Is Subtitle Merger free to use?

Yes. Subtitle Merger is free, requires no account, and has no per-file or per-use charge.

Are my files uploaded when I use Subtitle Merger?

No. Subtitle Merger is designed to process your input locally in the browser. Files are not uploaded to a server for processing.

What formats does Subtitle Merger support?

It reads common subtitle formats such as SRT and VTT and writes the converted or adjusted file back out.

Can I use Subtitle Merger on my phone?

Yes. Subtitle Merger is responsive and works in modern mobile browsers. Very large files may be limited by the device's available memory.

Subtitles tool

Subtitle Merger

Merge two overlapping SRT tracks into one sorted file.

Runs on-deviceNo sign-upFree

All subtitles tools

Workspace

Subtitle Merger

Runs locally

First subtitle fileLoad .srt / .vtt

Second subtitle file

Supports SRT and WebVTT. Cue times are parsed to the millisecond and rebuilt without touching your video.

Captions

The guide

By the utils.sbs team · Reviewed November 2026 · How we build and review tools

Quick answer

Subtitle Merger is a free browser-based subtitles tool. Merge two overlapping SRT tracks into one sorted file. It runs with JavaScript text parsing locally, requires no account and does not upload your files. Open the page, add your input, adjust any options and download the result.

What is Subtitle Merger?

Subtitle Merger is a free browser-based subtitles tool from utils.sbs. Merge two overlapping SRT tracks into one sorted file. It is built for quick, focused jobs: open the page, add your input, adjust the options and take the result with you. No account, install or server upload is required.

At a glance

Category	Subtitles
Input	SRT, VTT or plain subtitle text
Output	An adjusted SRT, VTT or plain-text subtitle file
Engine	JavaScript text parsing
Processing	In your browser
Price	Free
Account	Not required

How Subtitle Merger works

Subtitle files are parsed as text, adjusted with the selected timing or format options, and written back out as a downloadable file.

How to use Subtitle Merger

1Open Subtitle Merger and add your input.
2Use the default settings, or choose the format or detail level that matches your goal.
3Run the tool, check the preview or result, and download the output.

When to use Subtitle Merger

Convert subtitle files between SRT, VTT and plain text.
Shift or retime captions after editing a video.
Clean duplicate cues and line breaks before uploading captions.

Limitations

Overlapping cues or unusual text encodings may require manual cleanup after conversion.

Privacy and accuracy

Subtitle Merger processes its input in the browser whenever the platform API allows it. Files and values are not uploaded to a server for processing, and the tool does not require an account. For calculations, use the result as a reference and verify important decisions against the source formula or a qualified professional. Read our methodology.

FAQ

Subtitle Merger questions

What can I do with Subtitle Merger?
Merge two overlapping SRT tracks into one sorted file. Subtitle Merger is part of the Subtitles shelf on utils.sbs and is designed for quick, one-off tasks.
Is Subtitle Merger free to use?
Yes. Subtitle Merger is free, requires no account, and has no per-file or per-use charge.
Are my files uploaded when I use Subtitle Merger?
No. Subtitle Merger is designed to process your input locally in the browser. Files are not uploaded to a server for processing.
What formats does Subtitle Merger support?
It reads common subtitle formats such as SRT and VTT and writes the converted or adjusted file back out.
Can I use Subtitle Merger on my phone?
Yes. Subtitle Merger is responsive and works in modern mobile browsers. Very large files may be limited by the device's available memory.

Keep going

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