5 AI Tools That Turn Long Videos into Shorts

AI clipping tools can transcribe a long video, propose highlight segments, reframe them vertically, and add animated subtitles. They reduce the time spent finding candidate moments, but they do not know your editorial intent, whether a quote needs context, or whether a clip is accurate and safe to publish. The five tools below are not ranked; each should be tested with your own source material and normal publishing workflow.

Quick comparison

Tool	Best reason to test it	Watch for
OpusClip	Broad long-form clipping, automatic reframing, captions, and an editor in one workflow.	Free and paid plans differ in editing, watermark, storage, source imports, export time, and model access.
Submagic	Caption-led short-form editing with B-roll, silence removal, brand tools, and an optional long-video clipping workflow.	Long-to-short “Magic Clips” can be a separate add-on; check video-length and monthly upload limits.
Klap	A focused long-video-to-vertical-clip workflow and an API option for automated pipelines.	Compare web-app and API pricing separately, and test crop tracking and caption correction.
Vizard	Browser-based clipping, editing, collaboration, and publishing for teams.	Plan limits can be based on upload minutes, seats, projects, storage, and API use.
Choppity	A straightforward clip finder with transcript-based editing and vertical formatting.	Confirm current free-preview, watermark, export, upload-length, and team limits.

1. OpusClip

OpusClip analyzes uploaded or linked long-form video and proposes short clips with captions and reframing. It is a reasonable first test for podcasts, interviews, explainers, events, and videos in which both spoken content and visual framing matter. Do not treat a “virality” score as a prediction; review the hook, context, pacing, and fit for your actual audience. Check the current OpusClip plan comparison before relying on a free workflow.

2. Submagic

Submagic emphasizes animated captions and fast short-form polish, with tools for trimming, silence removal, B-roll, transitions, audio, and brand assets. Its long-video clipping feature may be packaged separately from the core editing allowance, so calculate the cost for both source processing and finished clips. It suits creators who want to refine the suggested clip in the same caption-focused editor.

3. Klap

Klap focuses on turning long videos into vertical clips with detected segments, reframing, and subtitles. It is worth testing when a simple web workflow or programmatic API is important. For automation, budget for input processing, clip generation, export, retries, storage, and manual review rather than comparing only a headline subscription price.

4. Vizard

Vizard combines clipping, reframing, captions, an online editor, workspaces, and publishing features. It is a useful candidate for a small content team that wants shared projects and brand consistency. Verify the current Vizard limits for source minutes, seats, storage, exports, resolution, and API access.

5. Choppity

Choppity offers automatic clip suggestions, captions, vertical framing, and transcript-oriented editing. It can be a good lightweight comparison point, especially when editors want to preview suggested moments before subscribing. Test how quickly a human can change clip boundaries, repair captions, and override the crop.

How to compare the tools fairly

Use the same representative source video in every tool. Include two speakers, names, jargon, screen content, pauses, and at least one quote that needs surrounding context.
Request the same target formats and approximate lengths.
Score the relevance of suggested moments, transcript word accuracy, speaker identification, crop stability, subtitle timing, and ease of correcting mistakes.
Check whether captions remain inside each platform's visible safe area and whether burned-in text can be exported separately as a caption file when needed.
Compare final visual and audio quality, watermark, export speed, project retention, collaboration, and publishing integrations.
Calculate cost using the number of source minutes, usable final clips, seats, storage, and revision time in a normal month.

Review every clip before publishing

Context: make sure the cut does not reverse or exaggerate what the speaker meant.
Captions: correct names, technical terms, numbers, profanity handling, punctuation, and speaker labels.
Framing: check faces, screen demonstrations, charts, and products throughout the clip—not just the first frame.
Rights: confirm permission for the source video, people shown, music, stock footage, logos, and generated B-roll.
Claims: verify factual statements and avoid an AI-written title or hook that the source does not support.
Privacy: do not upload client, employee, student, medical, or unreleased material until the service and account are approved for it.
Platform rules: review current disclosure, synthetic-media, copyright, advertising, and community requirements before posting.

Which tool should you choose?

Choose the product that produces the highest percentage of usable, correctly captioned clips from your real footage with an acceptable review burden. OpusClip is a broad starting point; Submagic emphasizes short-form polish; Klap is deliberately focused; Vizard adds a team-oriented browser workflow; and Choppity offers another transcript-led editor to compare. Free plans are useful for testing, but watermarks, editing control, export windows, and monthly limits can make them unsuitable for regular production.