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SubGenius.ai
bolt Quick Transcribe
bolt Zero-Upload Engine lock Zero Cloud Video Leaks speed Sub-Second Generation

AI Subtitles Without Sacrificing Your Privacy — Or Your Sanity.

Extract audio directly on your device with our zero-upload browser engine. Your heavy video file never touches the internet — only processed audio is transcribed in milliseconds.

rocket_launch Launch Studio Free (No CC) play_circle View Live Demo
Payload Reduction
500MB → 5MB
100x Bandwidth Saved
Turnaround Time
< 8.2s
Instant Processing
Global Reach
100+
Languages Auto-Detect
Economics
$0.08/min
90%+ Margin Free Tier
swords Architecture Faceoff

Old Boring SaaS vs. SubGenius Edge Gigachad

Legacy subtitle tools treat your confidential media like disposable payload. Here's why running FFmpeg in WebAssembly changes everything.

dangerous Legacy Risk Vectors
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Traditional Subtitle SaaS

Centralized Server Ingestion Pipeline

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1GB - 5GB 4K Raw Video Upload
Consumes vast outbound bandwidth and takes 4-12 minutes on standard connections.
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Persistent S3 Storage Risk
Unreleased videos, internal meetings, and raw takes sit on remote AWS/GCP drives susceptible to leaks.
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High Cloud Compute & Egress Tax
Users absorb bloated infrastructure fees ($0.30-$0.80/min) to subsidize multi-tenant video decoders.
Data Exposure Metric 100% Raw Media Exposed
verified Zero Data Retention
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SubGenius Edge Gigachad

Local-First WebAssembly Architecture

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In-Browser Local Audio Isolation
Zero bytes of video data ever leave your GPU/RAM. Demuxing runs at native multi-threaded speeds.
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Encrypted Lightweight Audio Stream
Only compressed speech tracks stream over TLS 1.3 to the nearest neural node.
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RAM-Only Transcribe & Instant Purge
Secure audio tokens convert to subtitles directly; audio instance shuts down immediately.
Video Cloud Transfer 0 Bytes (Mathematically Immune)
Client-Side Demuxer Simulator LIVE REPL

FFmpeg WebAssembly multi-threaded worker ripping 128kbps mono stream

Threads: 8 (WebWorker) SIMD: Active
[SubGenius Local Engine v2.4] STATUS: 200 OK

> [demuxer] input: '4k_director_cut_master.mov' (2,418.42 MB)

> [stream #0:1 -> #0:0] Audio: aac (LC), 48000 Hz, stereo, fltp, 384 kb/s

> [extract] target codec: libmp3lame, 16000 Hz, 1 channel, 48 kb/s

> [progress] 100% processed in 1.48s (Speed: 142.1x realtime)

> [payload] output: 3.12 MB. Dispatched to Secure Neural Node...

00:00.000 Active Speech Detected: 94.2% 03:14.220
Realtime Subtitle Feed STREAMING SSE
00:00:01.400 → 00:00:04.120
"Welcome to the high-performance edge computing demonstration."
00:00:04.200 → 00:00:07.850
"By keeping media demuxing entirely client-side, privacy is guaranteed."
00:00:08.000 → 00:00:11.300
"Whisper Large V3 converts speech to phonemes in under two seconds."
Encoding: UTF-8 WebVTT Copy Formatted Cue arrow_forward
hub Deterministic Flow

Engineered for Mathematical Velocity

Four lightning-fast stages bridging your browser's WebAssembly core with modern serverless AI acceleration.

01 laptop_mac

Local Ingestion

HTML5 File API binds raw video files. A dedicated Web Worker loads ffmpeg.wasm to rip audio straight to an in-memory mono MP3 buffer.

Client RAM Execution
02 router

Edge Routing

Audio chunks stream to global edge nodes. Sub-millisecond JWT authentication and edge rate-limiting validate quotas without origin database round-trips.

Anycast 330+ Cities
03 psychology

Dual-AI Synthesis

Dispatched to Whisper Large V3 Turbo for timestamped word cues, followed by context-aware models for multi-language subtitle translation.

Serverless GPU Array
04 sync_alt

Sync & Export

Tokens stream via Server-Sent Events to render in client editor. Instant export to WebVTT, SRT, JSON, or baked CSS animations synchronized with video playback.

Zero Server Footprint

Everything Developers Expect. Nothing Creators Fear.

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Zero-Upload Local Engine

High-efficiency audio processing executes directly inside Chrome, Safari, or Firefox without cloud video transfer.

Client-Native Engine arrow_forward
speed

Sub-Second Edge Transcribe

No spinning spin-up containers or GPU queues. Our global neural network warms up in milliseconds, delivering transcriptions 30x faster.

Ultra-Low Latency arrow_forward
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100+ Language Dialects

Translate audio on the fly into Spanish, Mandarin, German, Japanese, and 90+ other idioms with high semantic precision.

Context-Aware Translation arrow_forward
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Universal Subtitle Exports

Export standard .vtt, .srt, word-by-word timestamped .json, or copy formatted caption snippets.

Lossless Metadata arrow_forward
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Zero Logs • Zero Cookies

Designed from day one to comply with GDPR, HIPAA, and strict NDA requirements. In-flight streams disappear the moment the connection closes.

Cryptographic Privacy arrow_forward
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Developer REST & Webhooks

Automate enterprise captioning workflows with our edge endpoint. Send compressed audio payloads directly via curl or our official TypeScript SDK.

Explore API Specs arrow_forward
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Verified Creator Review
“We handle unreleased product teasers daily. SubGenius AI killed our anxiety of uploading gigabytes of master footage. The browser demuxes in seconds, it runs at $0.08/min, and the WebVTT cues are spot on.”
ER
Elena Rostova
Head of Production, HyperSync Studios
Built On Native Edge Tech
cloud Serverless AI Compute
rocket_launch Hybrid Static Edge
Zero Server State • Realtime Stream
redeem Instant Sandbox Access

Ready for Instant, Secure AI Subtitles?

Start right now with 5 complimentary minutes. No credit card required. Experience sub-second transcription with zero data retention.

play_circle Start Transcribing Free View Transparent Pricing
check_circle No Video Storage
check_circle Client-Side FFmpeg
check_circle No Account Needed for Demo