Generates subtitles, translations and AI dubbed voiceovers for video in 140+ languages.
Hei.io takes a video or audio file and produces synced captions, translated subtitles, and dubbed voiceovers without a studio. It supports over 140 languages and offers more than 440 voice options, plus voice cloning so a dub can keep something close to the original speaker's voice in 32 of those languages. Output formats include MP4 for video, MP3 for audio-only dubs, and SRT for subtitle files, and the company lists lip-sync as an upcoming feature rather than something shipped today. It's aimed at creators, video agencies, and marketing teams localizing content for international audiences, and is operated by HeiTech Oy, a company based in Helsinki, Finland.
Basic premium plan covers 25 translated minutes per month; heavier users can also buy translation time on a pay-as-you-go hourly basis instead of a plan.
Use tool โHei.io covers the full localization pipeline, captions, translated subtitles, and dubbed voiceover, in one place, which saves stitching together a transcription tool and a separate dubbing tool. Voice cloning in 32 languages is a real differentiator versus subtitle-only tools, though lip-sync is still listed as coming rather than available. The plan structure mixes per-minute plan allowances with a separate pay-as-you-go hourly rate, which is hard to compare at a glance.
Watch out: Check whether the advertised price is a limited-time discounted rate before budgeting for renewal, since the site lists both a regular and a halved promotional price side by side.
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