OpenSLR (catalog)

by Daniel Povey (JHU CLSP)

Don’t want to install OpenSLR? Drop the file here.

The first 20 minutes of any recording are transcribed free: a recording up to 20 minutes transcribes in full, a longer one is previewed, and a pack from $6 (500 minutes) transcribes the rest and opens every export, and credits never expire.

Open Speech and Language Resources — the index of 130+ free speech corpora.

Web  ·  free

TL;DR

Best for discovering open speech corpora — every major academic dataset has a SLR-N ID. Pricing: free.

Category
Open source
Pricing
free
Platforms
Web

What it is

OpenSLR is the canonical index of 130+ free open speech + language datasets, hosted by Daniel Povey. LibriSpeech, MUSAN, RIRS-Noises, AISHELL, TED-LIUM, MLS, and dozens of low-resource corpora live here under SLR-N IDs.

Best for: Discovering open speech corpora — every major academic dataset has a SLR-N ID.
Watch out for: Per-resource licenses (CC BY, Apache-2.0, custom) — check each SLR-N page. Hosted as a free convenience catalog by Daniel Povey.

Install / use

Go to OpenSLR (catalog) www.openslr.org

What people actually do with OpenSLR (catalog)-style transcription

The tool is the means. These are the jobs — each one priced at published rates, each one wired up on its own page.

Transcribe a whole back catalogue in one runThe archive is the asset, but one-at-a-time upload means it never gets done.…1,000 hours ≈ $480, onceTranscribe every new file in a Drive folderFiles accumulate in a folder nobody opens, and the knowledge in them is invisible to search.…≈ $0.29 per audio hour on the $24 packCut short-form clips out of a webinar automaticallyThe clips worth posting are buried somewhere in a 60-minute recording and finding them by scrubbing costs more than the…60-min webinar ≈ $0.72

Wire it into Amazon S3n8nMake.comGoogle DriveZapierSlack

Features

Speaker diarizationNo
Word-level timestampsNo
Streaming / real-timeNo
Languages supported70
HIPAA eligibleNo

OpenSLR (catalog) vs Whipscribe

FeatureOpenSLR (catalog)Whipscribe
CategoryOpen sourceTranscription APIs
Pricingfree$6–$24 one-time packs (credits never expire) · first 20 minutes free
Speaker identificationNoNamed in the summary, key quotes and chapters
Word timestampsNoYes
StreamingNoNo
Languages7099
PlatformsWebWeb, API, MCP

Alternatives to OpenSLR (catalog)

OpenAI Whisper
OpenAI

The reference open-source multilingual ASR model from OpenAI.

OSS · MIT ★ 108.7k
whisper.cpp
Georgi Gerganov

C/C++ port of Whisper — runs on anything, from a Raspberry Pi to Apple Silicon.

OSS · MIT ★ 53.5k
faster-whisper
SYSTRAN

4× faster than reference Whisper using CTranslate2 — production sweet spot.

OSS · MIT ★ 25.3k

Frequently asked about OpenSLR (catalog)

Is OpenSLR (catalog) free?

Yes. OpenSLR (catalog) is free and open source.

Does OpenSLR (catalog) work on Mac, Windows and Linux?

OpenSLR (catalog) runs in the browser, so it works on any desktop OS with a modern browser, and on phones and tablets.

How do I install OpenSLR (catalog)?

Download the installer for your platform from https://www.openslr.org/ # browse SLR-1 through SLR-130+. No terminal needed.

How many languages does OpenSLR (catalog) support?

OpenSLR (catalog) lists 70 languages.

Does OpenSLR (catalog) identify different speakers?

No. OpenSLR (catalog) does not label speakers; a conversation comes back as one continuous text. If you need speaker labels, that is a separate tool or a different service.

Does OpenSLR (catalog) give word-level timestamps?

No — OpenSLR (catalog) produces segment or sentence timing only, so subtitle cues can land mid-word.

Can OpenSLR (catalog) transcribe live audio?

No — OpenSLR (catalog) works on finished files, not a live stream.

Is OpenSLR (catalog) HIPAA compliant?

OpenSLR (catalog) does not claim HIPAA compliance. For PHI, run it on infrastructure you control or choose a service that will sign a BAA.

What are the limitations of OpenSLR (catalog)?

Per-resource licenses (CC BY, Apache-2.0, custom) — check each SLR-N page. Hosted as a free convenience catalog by Daniel Povey.

Who is OpenSLR (catalog) best for?

Discovering open speech corpora — every major academic dataset has a SLR-N ID.

Does OpenSLR (catalog) run offline?

OpenSLR (catalog) runs on your own machine — it is open source, so nothing leaves the computer unless you configure it to.

Is there a OpenSLR (catalog) desktop app?

No — OpenSLR (catalog) is browser-only. There is nothing to install and nothing runs on your machine.

Who makes OpenSLR (catalog)?

OpenSLR (catalog) is made by Daniel Povey (JHU CLSP).

What kind of tool is OpenSLR (catalog)?

In this directory OpenSLR (catalog) is filed under dataset as a open-source tool.

What are the alternatives to OpenSLR (catalog)?

There is a side-by-side page at /tools/openslr-alternatives comparing OpenSLR (catalog) with the closest tools in the same category on price, platform and features.

Whipscribe is a hosted transcription service. If you want transcripts without running infrastructure, paste a URL or drop a file in the form below — you'll have a transcript in seconds.

Transcribe your recordings

Running OpenSLR (catalog) yourself? Send the same file here and compare the transcript. Transcribe any language, any recording · Transcription services from $0.29 an hour · Transcribe from any meeting or recording platform · How to transcribe, step by step

Explore

All transcription tools · By language · By platform · By file format · How-to guides · Transcription services · Transcription API · Pricing

Have the recording already?

Skip the setup and send the file or the link: see MP3 to text for long recordings, transcribing a podcast episode and the SRT file generator.

Comparing tools before you pay?

If you would rather pay a service than run software yourself: see how the best transcription services compare, cheap transcription services and the real cost per hour and our transcription service with prices and turnaround.