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BentoSub
Fast, private AI subtitles — your video stays on your device
Privacy-first AI subtitle translation. Your video never leaves your device — audio is extracted locally, then transcribed and translated in minutes. Supports 100+ languages and mixed-language audio (Japanese-English, Korean-English, etc.). Use code PRODUCT-HUNT for 100 free premium minutes..
Hey PH! I built BentoSub after running into two problems that kept annoying me as a content creator:
1. Privacy. Most subtitle tools require you to upload your entire video file to their servers. A 2GB recording
shouldn't need to travel to someone's cloud just to generate subtitles.
2. Mixed-language audio. I work with content that mixes Japanese and English — code-switching, loanwords, tech terms
that shouldn't be translated. Standard ASR tools handle this poorly and usually just pick one language.
How BentoSub works differently:
Your video file never leaves your device. Audio is extracted locally in your browser using WebAssembly — only ~30MB of audio goes to our servers instead of your full video. It's deleted from our servers the moment your job is done.
For mixed-language content, BentoSub uses a multilingual transcription model that handles code-switching naturally. Japanese-English, Korean-English, Chinese-English — loanwords and technical terms come out accurately.
The workflow is simple:
1. Drop your video in (stays on your device)
2. Choose source + target language
3. Get bilingual subtitles in a few minutes
4. Edit in the browser, export SRT
You get 30 free minutes to try it — no credit card needed.
For the PH community — use code PRODUCT-HUNT for 100 free premium minutes. That's enough to subtitle 6–8 videos with our best-accuracy engine, including mixed-language support. No credit card required.
Would love to hear your feedback, especially from creators who work with multilingual content. What features would make this a must-have for you?
About BentoSub on Product Hunt
“Fast, private AI subtitles — your video stays on your device”
BentoSub was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #97 on the daily leaderboard. Privacy-first AI subtitle translation. Your video never leaves your device — audio is extracted locally, then transcribed and translated in minutes. Supports 100+ languages and mixed-language audio (Japanese-English, Korean-English, etc.). Use code PRODUCT-HUNT for 100 free premium minutes..
On the analytics side, BentoSub competes within Productivity, Artificial Intelligence and Video — topics that collectively have 1.1M followers on Product Hunt. The dashboard above tracks how BentoSub performed against the three products that launched closest to it on the same day.
Who hunted BentoSub?
BentoSub was hunted by Take five. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of BentoSub including community comment highlights and product details, visit the product overview.
Take five