Select your video

Add subtitles manually or upload an SRT file in the editor.

Supports MP4, WebM, MOV, MKV

Add Subtitles to Video Online

Add subtitles to any video in minutes, right in your browser. Upload a video, type subtitles manually or import an SRT file, then style the text to be readable on any background.

Everything happens locally on your device, so there are no uploads, no subscriptions, and no watermarks. Full 1080p support included.

Before saving your movie with subtitles, you can convert it to any desired format like MP4, MKV, AVI, MOV, and others.

How to Add Subtitles to a Video

Step 1: Upload a recording or movie

Add a video from your computer, phone camera roll, or cloud. The tool accepts up to 500 MB for free and processes everything locally.

Step 2: Add and edit subtitles

Choose to add captions manually or upload an SRT file. Edit the text and timing, select a font, size, alignment, and colors. Save the SRT file if needed, then export.

Step 3: Download the subtitled video

Preview the video to confirm everything looks right, then download the final file or upload it to your cloud storage.

Why Use This Subtitle Tool?

100% Online

No software installs. The tool runs in your browser, on desktop or mobile.

Private and Secure

No upload, no subscription, no watermark. Your files stay on your device.

Manual or SRT

Create subtitles from scratch or import an SRT file and edit them.

Readable on Any Background

Pick fonts, sizes, alignment, text color, and background styles to improve legibility.

Frequently Asked Questions

Is it possible to edit an already existing subtitles file?

Yes. Upload an SRT file, edit the text or timing, and export the updated subtitles or the final video.

What subtitle file formats does Clideo support?

We support standard SRT files, which are compatible with most video platforms.

Am I allowed to change the font style and color of my subtitles in a video?

Absolutely. Choose a font, size, alignment, text color, and background color to make subtitles stand out.

What is the difference between hard coded and soft subtitles?

Hard coded subtitles are baked into the video image, while soft subtitles are separate files that players can toggle on or off.

Is it possible to save my subtitle project so that I can edit it later?

You can export the SRT file and re-upload it later to continue editing.

What should I do when my SRT file will not upload?

Make sure the file extension is .srt and the timestamps are in the correct format (HH:MM:SS,mmm).

What types of video can I add subtitles to?

The tool supports MP4, MOV, WebM, and MKV videos. Convert other formats first if needed.

How many characters should I have per subtitle line?

A good rule is 32 to 42 characters per line for readability, but you can adjust based on your content.