Whisper Web, also written WhisperWeb, is a browser-based speech-to-text service built on OpenAI's Whisper model. Its distinguishing choice is where the computation happens. In Free mode, transcription runs entirely inside your browser using WebGPU and WebAssembly acceleration, which means your audio never leaves your device and you get privacy by architecture rather than by policy. Once the model has downloaded on your first visit, Free mode works offline as well.
The Unlimited plan swaps local processing for cloud infrastructure when you need it. That raises the ceiling to individual files of up to 10 hours or 5 GB, enables batch uploads of up to 50 files at a time, adds cross-device transcript sync, and puts your jobs at the front of the processing queue. Cloud files are deleted after transcription completes. Both tiers support 99 languages with automatic language detection, so you rarely need to configure anything before starting.
Input is flexible: you can record from your microphone, upload a file, or point Whisper Web at a URL. Output covers the formats people actually need, including plain TXT for notes, SRT and VTT for subtitles, and JSON for downstream processing. Beyond the core transcription tool, the site offers a Whisper API, a Whisper MCP integration, and a Chrome extension. It is an independent product that uses the open Whisper model, not an official OpenAI service, and it is aimed at students, journalists, podcasters, and developers who want fast, private transcription without installing software.
