User Manual

The header holds the title and a ? button that opens this manual; under it are two tabs, General and Advanced. The toolbar icon always keeps the AxiSub purple background — only the links in the middle change colour, and they tell you at a glance whether the service is ready.

• Ready — signed in, service on, connected to the server.
• Service is on, but we cannot reach the server. No subtitles.
• Signed out, or Subtitle Service is switched off.
• Service is on, but Generation is set to Inactive.

Subtitle Service is the master switch; switching it off asks you to confirm first. While it is off the popup hides the working mode and every advanced setting, leaving only Interface — that is expected. Generation (Active / Inactive), inside Live Subtitle Generation, is a second and narrower switch: leaving it Inactive keeps the extension installed but produces no subtitles, which is the red cross on the icon.

Live Subtitle Generation listens to the video and writes subtitles for you; this is the mode that uses credits. Attach Subtitle File displays a .srt or .vtt file you supply and is free, because it never calls the speech or translation models — it finds a suitable video on the page itself and matches the file to it, so you don't have to point at one. Switching mode saves immediately. In Attach mode the advanced settings are greyed out, with a notice explaining why.

Auto, the default, captions every video that is playing — including clips that started in the background before you scrolled to them, which is useful on feeds like TikTok or Instagram where you flick through clips quickly. Manual puts a selection button on each candidate video instead, labelled with a snippet of what we heard; click it to choose, and only that video gets subtitles. Under Filters you can raise the minimum player size and minimum duration, which is what keeps subtitles off thumbnails and ads.

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1. 1In Manual mode every candidate video gets a button like this, labelled with a snippet of what we heard. Click it to choose that video.

Target Language, on the General tab, is the language your subtitles are translated into. Translation Quality trades speed for accuracy — lower is faster, higher is more careful. Turn on Speech-to-Text Only when you want no translation at all: subtitles stay in the original language and cost less, 2 credits per 3 seconds instead of 1 credit per second. Extra Translation Instructions describe the tone, style or vocabulary a particular video needs; the Type / Value dropdowns plus Add build the line for you, and you can also type your own. Note that UI Language, under Advanced → Interface, is a different thing — it changes the language of the popup itself.

Open Subtitle Look and Video Qualification to set where subtitles sit (bottom, top or middle), their size (Small up to Extra Large), text colour, background colour, opacity and font.

Everything on the General tab — Subtitle Service, working mode, Generation, Video Selection and Target Language — plus UI Language, is saved as soon as you change it. The settings on the Advanced tab (subtitle appearance, filters, translation quality, extra instructions) only take effect when you press Apply. Reset asks for confirmation and puts every setting back to its default.

Signed out, the popup offers Login and Create Account. Signed in, it shows your name, your email, and your balance as credits plus an estimate of the minutes left; Buy opens the Pricing page and Website opens this site. One credit covers one second of audio, transcription and translation included, and silent stretches are never charged. Credits never expire.

We don’t process encrypted audio or video streams. Players that use DRM — Netflix, Disney+ and similar services — are not supported, and no subtitles will appear there.