Katto turns long videos into scored, captioned 9:16 clips and publishes to 7 platforms. Flat per-video pricing from €4.90/month billed yearly.
Researched and fact-checked by Bartu Cavusoglu · Updated October 26, 2026
Katto is a web-based AI video clipper that turns long videos into short, captioned vertical clips. Users paste a YouTube link or upload a file, and Katto finds the strongest moments, reframes them to 9:16 and adds captions. It is aimed at people who publish on several short-video platforms and would rather not scrub through hours of footage by hand.
Its main pitch is flat pricing. Plans count videos per month rather than credits or minutes, so a 90-minute episode costs the same as a 10-minute one. Katto also scores each clip on hook, flow, value and trend, which gives users a ranked shortlist instead of an unsorted timeline. The site states the product is built in Japan.
A user adds a source video, either as a YouTube link or as an MP4, MOV, WebM or MKV upload of up to 90 minutes. Katto transcribes it, detects candidate moments and produces a ranked set of clips. According to the pricing FAQ, a video typically yields 8 to 20 clips, up to 30 for long, rich sources, and the user chooses which to render.
Users can steer the selection by describing an intent, topic, hook or audience angle. Each clip is then reframed shot by shot, captioned and given optional extras such as a hook, B-roll and emojis. Everything the AI applies stays editable, including a text-based editor where deleting transcript words changes the cuts. Finished clips can be exported or published.
The scoring system rates every clip from 0 to 100 on hook, flow, value and trend. The Miru AI reframe engine converts 16:9 footage to 9:16, 4:5 or 1:1 while following speakers, faces and action, with speaker detection and split layouts for dialogue. Captions are animated and word-synced, available in 99 languages with precise word timing in 41 and automatic proper-noun correction.
Beyond that, Katto offers AI dubbing in 19 languages, an AI hook overlay, B-roll, animated emojis, removal of silences and filler words, vocal cleanup, background music, brand kits, folders and SRT export. For developers, a REST API with signed webhooks and idempotency keys is available, along with a hosted MCP server that lets AI assistants create and fetch clips.
Katto is an AI video clipper that turns long videos into post-ready vertical shorts. It detects the best moments, reframes them to 9:16, adds captions in 99 languages, scores each clip for virality and publishes to 7 platforms.
Katto has a free plan at €0. Solo is €8.90 a month, or €4.90 a month billed yearly (€58.80/year). Creator is €14.90 a month, or €11.90 a month billed yearly (€142.80/year). Plans count videos per month, not credits.
Yes. The Free plan gives 2 videos a month, up to 30 minutes each, with no credit card required. Clips are 720p with a small Katto watermark. The Creator plan also offers a 7-day free trial.
Katto accepts YouTube links and MP4, MOV, WebM and MKV files up to 90 minutes. Uploads are limited to 3 GB on Free and 5 GB on paid plans. The pricing page also lists Twitch, Vimeo, Rumble, Zoom and Dailymotion as sources.
Katto exports directly to YouTube, TikTok, Instagram, LinkedIn, Threads, Bluesky and Mastodon. Direct export to 7 platforms and scheduling are listed on the Creator plan.
According to Katto, it uses flat per-video pricing instead of credits, shows transparent scoring on hook, flow, value and trend, and offers a reframe that works on sports, gaming and multi-speaker shows. These are the company's own claims.
Yes. A REST API described by an OpenAPI 3.1 document, signed webhooks and a hosted MCP server are included on every plan, including Free.
On the Free plan, clips carry a small Katto watermark. Solo and Creator export at 1080p with no watermark.