RealSub CD Key
PC price comparison · RealSub Studio · Oct 27, 2026
Free To PlayUtilities
Live subtitles for Japanese video that has none. Recognition runs locally — from 2 GB of VRAM on a GTX 10-series card (4 GB is better), Vulkan or CPU fallback without an NVIDIA GPU. Capture your whole system, or just one app. Free app = full live transcription; DLC unlocks translation and export.
RealSub is free to play.
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About RealSub
Turn audio you cannot follow into subtitles you can read RealSub is a live subtitle tool for Windows. It captures whatever your PC is playing — or the sound of one specific app you pick — recognizes the speech locally, optionally translates it, and shows the result in a floating subtitle bar on top of everything else. Japanese video with no subtitles, foreign-language streams, lectures, podcasts, interviews, game dialogue: if the sound comes out of this PC, it can be subtitled. Including the places a player plugin can never reach.Hardware first, because the bar is lower than you expect Starts at 2 GB of VRAM on a GTX 10-series card (4 GB or more is more comfortable. If the GPU fails to initialize or the model fails to load, RealSub switches to CPU mode by itself — nothing for you to configure) We strongly recommend an NVIDIA GPU — that is where RealSub performs at its best. Other GPUs go through Vulkan on a best-effort basis: the first run does a short performance test (tens of seconds) and only enables it if it passes. We have verified it on some GPU models, but cannot promise every card. If the test fails or Vulkan errors at runtime, RealSub falls back automatically, shows a tray notification, rewrites the device setting to what is actually running, and you can run "Re-test GPU performance" in Settings any time. No NVIDIA GPU? It still works — RealSub tries Vulkan first; if Vulkan is unavailable, does not pass the test, or the model fails to load, RealSub switches to CPU mode with a smaller recognition model. Accuracy is lower than on a GPU and latency grows noticeably, but you get subtitles. Models ship inside the app — nothing to download, no account, no API key to get started What the free app does, and what the DLC unlocks Free base app: complete live transcription. Recognition languages, the bundled models, overlay appearance, global hotkeys, per-app audio capture — none of it is locked, and there is no usage counter. Full Version DLC: unlocks translation (bilingual subtitles) and session history + SRT / TXT export. A 7-day full-featured trial starts the first time you use RealSub (once per Steam account; reinstalling does not reset it). When the trial ends, the app switches to the free version described above automatically. Features Subtitle one app, not your whole desktop — per-process audio capture (Windows 10 2004+). Pick your browser or media player and only its audio is transcribed; system notification sounds and other windows stay…Read more
RealSub system requirements
Minimum
- Requires a 64-bit processor and operating system
- OS: Windows 10 version 2004 (64-bit) or newer
- Processor: Any 4-core CPU from the last decade, AVX2 support required
- Memory: 8 GB RAM
- Graphics: None required — runs in CPU mode (uses a smaller recognition model; accuracy is lower than on a GPU and latency noticeably higher)
- Storage: 7 GB available space
- Additional Notes: Transcription and the default local translation work offline; online translation services require an internet connection. Per-app (per-process) audio capture requires Windows 10 version 2004 or newer. Install on an internal drive (SSD recommended): every cold start reads about 4 GB of models and runtime libraries, which can take around a minute on a hard disk drive and longer from a USB external drive.
Recommended
- Requires a 64-bit processor and operating system
- OS: Windows 11, or Windows 10 version 2004 (64-bit) or newer
- Processor: 6-core or better
- Memory: 16 GB RAM
- Graphics: NVIDIA GeForce GTX 10-series or newer (recommended), from 2 GB of VRAM, 4 GB or more is more comfortable; other GPUs can try Vulkan acceleration (best-effort); with no usable GPU RealSub switches to CPU mode automatically, and you can also pick the compute device yourself in the settings
- Storage: 7 GB available space
- Additional Notes: An internet connection is required for online translation services. Installing on an SSD is recommended (startup usually takes under half a minute).
RealSub key FAQ
+What is a RealSub CD key?
A RealSub CD key is a digital code that unlocks the game on a PC platform. After redeeming it, you download the game directly from that platform and it stays in your library.
+Is it safe to buy a RealSub key?
Buying from an official store such as Steam, GOG or Epic Games is always safe. Key resellers are often cheaper but sell keys second-hand, so check the region lock and buyer protection before you buy. Every offer on GameKeyDeal is labelled as official or reseller.
