5 best free AI subtitle tools: limits and exports (2027)

You need captions, but the free tool you choose has to deliver the kind of file your project actually uses. A caption track, a styled video and an editable transcript are different outputs.

Finding an export gate after correcting the words means doing that work again somewhere else. This guide compares five subtitle tools by their free limits and final delivery. You’ll see which workflows fit short social clips, browser editing or transcript-led projects, plus a YouTube-only route when you just need captions on that platform.

Five free AI subtitle tools and their real limits

What “free” must include for your project

• Enough input: the free duration or media allowance must cover the actual clip.

• Correction: names, numbers, terminology and timing must be editable somewhere in the workflow.

• The right output: choose burned-in video for fixed styling or SRT/VTT for a platform-controlled caption track.

• Acceptable branding: verify whether the free video includes a watermark.

• Repeatability: a one-time trial is different from a recurring monthly or daily allowance.

1. Magic Hour: short no-sign-up caption renders

Magic Hour's Auto Subtitle Generator currently accepts videos up to 200 MB, generates the first 30 seconds in the public guest flow, supports more than 50 languages and offers four caption templates. The page states that guest users have a limited daily allowance and that word-level transcript editing is not yet available in that flow.

Use it when you need to put readable styled captions on a short social clip quickly. Because the guest flow does not offer transcript correction, listen and read through the entire render before publishing; regenerate or use an editor when a name, number or term is wrong.

2. CapCut: free captions inside a social editor

CapCut's current auto-caption guide documents automatic captions, correction, bilingual captions and export from the app. It is the most relevant choice here when subtitles are one step inside a phone-first social edit.

Verify the exact control on the mobile, desktop or web version you plan to use. CapCut operates several product surfaces, so a feature shown in one guide may not appear identically everywhere.

3. VEED: browser editing with a free-export watermark

VEED's subtitle tool supports transcript and timing edits, styling, translation, burned-in export and SRT download. VEED's current watermark help says videos exported from a free account include a VEED watermark.

Watch VEED’s workflow

VEED’s November 4, 2025 tutorial shows caption generation, manual correction and styling. The recorded interface and offer wording may differ from today’s product.

Source: How to Add Subtitles to Video That Actually Grab Attention

Use it when browser-based correction is more important than a watermark-free free video. Check the live plan before relying on a specific subtitle-file, translation, duration or resolution allowance.

4. Descript: free transcript-led editing

Descript's current pricing page lists a free plan with 60 media minutes per month and unlimited dynamic captions. Its caption documentation covers script-synced presets, active-word styling, animation and separate layers for multiple speakers.

Use it when the transcript is also the editing interface, especially for spoken videos. The free media allowance is monthly, so test one representative project and account for every imported or recorded minute before moving a series.

5. Kapwing: browser collaboration with plan-gated exports

Kapwing's pricing page offers a free editor, while the current subtitle help documents automatic captions, transcript and timing edits, animated styling, custom spelling, translation and burned-in or SRT/VTT/TXT delivery.

Watch Kapwing’s workflow

Kapwing’s September 4, 2026 tutorial demonstrates automatic and styled subtitles. Verify your current plan’s export, watermark and usage limits separately.

Source: How to Add Subtitles to a Video (And Make Them Your Signature Style) Kapwing New Update!

Use it when a browser project and collaborative correction matter. Confirm the current free video duration, resolution, watermark and sidecar-file access: Kapwing explicitly ties some subtitle features and file exports to paid plans.

A fully free option for YouTube caption tracks

YouTube Studio lets channel owners edit automatic caption text and timestamps, publish a corrected track and download caption files. Use it when the video will live on YouTube and animated burned-in typography is unnecessary. Include speaker labels and meaningful non-speech audio when creating accessibility captions.

Run one fair free-plan test

Free allowances, watermarks and file exports change frequently. We checked the providers' current first-party pages on September 13, 2026. Test the final download or caption track before building a recurring workflow around any free plan.

Magic Hour publishes this comparison and is one of the tools listed. We compared documented subtitle inputs, free-plan limits and export formats rather than transcription accuracy in a shared test.

• Use one 60-second clip with a name, brand, number, accented phrase and background music.

• Generate with defaults and record whether an account or payment method is required.

• Correct the transcript and measure how long it takes to approve text and timing.

• Export the real deliverable then record watermark, resolution, caption format and any blocked feature.

• Inspect on a phone for line breaks, face coverage, contrast and platform-control overlap.

Keep the source, reference transcript, output and date. Do not treat a provider's marketing accuracy percentage as evidence for your language, microphone or speakers.

Related caption guides

Use the animated AI caption tool comparison for Shorts, Reels and TikTok styling, the broader subtitle-generator guide for translation and delivery workflows, or the step-by-step subtitle tutorial when you have already chosen a tool.