Free Auto Caption Generator

Create automatic captions for videos, tune readability, and download caption results for social posts, courses, and publishing.

1Upload your video
2Generate captions
3Download caption results

Free tool

Auto Caption Generator

Generate captions for your video and export both SRT and a subtitled MP4.

Free generations left today: 1 / 1

Drag and drop or

Free: up to 60 minutes and 100 MB per file. to unlock higher limits.

or drag and drop your video here

Custom vocabulary (optional)

Add technical words, brand names, proper nouns, or uncommon phrases to improve transcription accuracy.

Separate entries with commas or new lines.0/100 terms

Subtitle layout

Set line wrapping before generation, then adjust the SRT export after it is ready.

Max lines

Characters per lineShorter lines read better on phones.

Subtitle style

Choose how subtitles appear on the exported video and preview the look immediately.

Font

Size

Text color

Background

Position

Readable subtitles stay clear on every frame.

Ready to generate subtitles.

How auto captions work

Create readable captions for videos people watch with or without sound.

Upload your video

Add a video up to 60 minutes and choose the subtitle layout before generation.

Generate captions

VoiceCheap creates timed caption text and prepares a subtitled video export.

Download caption results

Save the SRT file for editing or download the subtitled MP4 for publishing.

When to use auto captions

Use automatic captions when the final video needs readable text on screen, not just a separate subtitle file.

Caption short social clips for silent viewing.
Create readable captions for tutorials, product videos, and course clips.
Export both an editable SRT and a subtitled MP4 from one upload.
Adjust subtitle line length, font size, color, background, and position.
Prepare videos for audiences who watch without headphones or sound.

Private video processing

Uploaded videos are processed to create captions and are removed after the job finishes.

Which subtitle tool should I use?

Pick the tool by output. Use SRT tools when you need an editable subtitle file, and video tools when you need captions on the exported MP4.

Comparison of VoiceCheap subtitle tools by input, output, and best use case.
Tool	Best for	Input	Output	Use this when
Video to SRT	Fast SRT conversion	Audio or video	SRT	You want the quickest path from media to SRT
Subtitle Generator	Preview and cue editing	Audio or video	SRT	You want to review subtitles beside your media before export
Auto Caption GeneratorYou're here	Social captions	Video	SRT or MP4	You want captions for publishing
Add Subtitles	Burned-in video subtitles	Video	SRT and MP4	You want a ready-to-share video
Subtitle Translator	Translate subtitles	SRT or subtitle text	Translated subtitles	You already have subtitles

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Auto caption generator FAQ

What are automatic captions?

Automatic captions are timed text generated from the speech in a video. They help viewers follow the content when audio is muted or hard to hear.

Can I download a caption file and a subtitled video?

Yes. This workflow creates an editable SRT file and a subtitled MP4 so you can keep the captions separate or publish the video directly.

How do I make captions readable on mobile?

Use shorter lines, a clear font size, strong text contrast, and a position that avoids covering faces or important visuals.

What are the free limits?

You can generate captions for videos up to 60 minutes with 1 free generation per day.

Are my videos stored?

No. Videos are processed and removed automatically after caption generation.

How do I get higher caption limits?

Create a free VoiceCheap account to unlock higher limits and longer caption jobs.

Translate your videos and use audio & video tools