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Mozilla Data Collective is rebuilding the AI data ecosystem with communities at the centre. Access over 470+ high-quality global datasets, built by and for the community in a transparent and ethical way.

Datasets

Community

Kokoro Speech Dataset

Kokoro Speech Dataset is a public domain Japanese speech dataset. (https://github.com/kaiidams/Kokoro-Speech-Dataset)
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License: libribox

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Locale: ja

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Task: TTS

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Format: FLAC

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Size: 3.98 GB

Community

Sundanese TTS

This dataset uses the Priangan dialect of West Java with Indonesian code-mixing and code-switching.
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License: CC-BY-SA-4.0

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Locale: sun

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Task: TTS

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Format: WEBM, TSV

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Size: 298.10 MB

MDC Community Concierge

Bangor Miami Spanish-English Corpus

Spanish-English bilingual speech corpus with 35 hours of recorded audio and 240,000 words.
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License: GPL-3.0

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Locale: es-US, en-US

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Task: ASR

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Format: MP3, CHA, TSV

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Size: 1.12 GB

Keblagh e Azergi

Elkhani Hazargi Literature Corpus

Hazargi literary corpus (~0.5M tokens) of poetry, folklore, and prose texts representing Hazara linguistic and cultural heritage.
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License: CC-BY-NC-4.0

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Locale: haz

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Task: NLP

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Format: TXT

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Size: 2.46 MB

Aim Foundation

Dari Literature Corpus by Anjuman e Adabi Nayestan

A ~1 M-token Dari (Afghan Persian) literary corpus compiled by Anjuman e Adabi Nayestan, covering prose, poetry, and cultural texts in Perso-Arabic script.
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License: CC-BY-NC-4.0

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Locale: prs

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Task: NLP

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Format: TXT

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Size: 12.67 MB

Collaborative Action For Research & Development (CARD)

IBT Torwali Wordlist

The IBT Torwali Wordlist contains approximately 20,000 unique entries in Torwali (ISO 639-3: trw), an under-documented Indo-Aryan language spoken in northern Pakistan. The dataset comprises standardized lexical entries covering core vocabulary, function words, and culturally salient terms, with consistent orthography and normalization suitable for linguistic and computational use. Entries are aligned with English and Urdu glosses, and include part-of-speech tag.
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License: CC-BY-SA-4.0

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Locale: trw

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Task: NLP

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Format: CSV

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Size: 312.87 KB

MDC Community Concierge

Bangor Siarad Welsh-English Corpus

Welsh-English bilingual speech corpus with 40 hours of recorded audio and transcriptions making up 450,000 words
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License: GPL-3.0

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Locale: cym

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Task: ASR

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Format: MP3, CHA. TSV

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Size: 2.13 GB

MDC Community Concierge

Bangor Patagonia Welsh-Spanish Corpus

Welsh-Spanish corpus contains around 195,000 words.
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License: GPL-3.0

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Locale: cym, spa

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Task: ASR

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Format: MP3, CHA, TSV

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Size: 988.02 MB

Kaleem Art Press

Saraiki-English Parallel Corpus

English–Saraiki parallel corpus: 51,447 aligned sentence pairs (~0.89M words), translated by Kaleem Art Press for MT and Saraiki NLP research.
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License: CC-BY-NC-4.0

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Locale: mul

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Task: MT

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Format: CSV

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Size: 1.92 MB

Kaleem Art Press

Jhoke Publisher Multan’s Saraiki Newspaper Corpus

Jhoke Publisher Multan’s Saraiki Newspaper Corpus (~1.25M tokens) is a normalized UTF-8 collection of Saraiki newspaper.
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License: CC-BY-NC-4.0

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Locale: skr

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Task: NLP

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Format: TXT

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Size: 2.30 MB

Institute of African Digital Humanities

Mada-French Parallel Corpus 1.0

This dataset comprises a parallel corpus of 2,154 lines of translations of literary texts from Mada (mxu) to French.
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License: NOODL-1.0

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Locale: mxu

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Task: TTS

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Format: TSV

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Size: 122.37 KB

Community

Javanese TTS of Banyumasan Dialect

This dataset contains various topics about everyday life. The topics include society, environment, media, education, culture, health, etc.
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License: CC-BY-SA-4.0

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Locale: jav

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Task: TTS

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Format: WEBM, TSV

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Size: 559.08 MB

IT'S EASY TO UPLOAD & CONTROL YOUR DATA

Upload your dataset

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Mozilla Data Collective works by allowing you to share your data, retain ownership of it, and control who uses it. You can share openly, using existing licenses, or you can build your own.

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JOIN THE MOVEMENT

Join Mozilla Data Collective

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Mozilla Data Collective wants to radically reimagine our data as power. We are anti-extractivism, anti-monopoly and deeply, profoundly pro-people. We are a collective of linguists, technologists, activists, researchers and creatives who want AI to be all it promises to be - not all it threatens to be. Here, you can share your datasets on your own terms.

FAQs

Find answers quickly

What is Mozilla Data Collective?

Mozilla Data Collective is a platform in the truest sense. It’s yours to stand on, and make of it what you will. We have dual roots in two Mozilla projects - Common Voice, a CC0 public dataset to help tech speak your language - and the Data Futures Lab - an experimental space for instigating new approaches to data stewardship challenges. Mozilla Data Collective works by allowing you to share your data, retain ownership of it, and control who uses it.


How does it work?

We partner with organizations and individuals to make their data available through Mozilla Data Collective. You can share openly, using existing licenses like Creative Commons, or you can build your own. You can open up your data for everyone, or just for some types of downloaders, you can set custom constraints, ask for exchange, compensation or recognition. You can govern it as an individual, a co-operative, a trust or something else. After all, it’s your data. The people who access your datasets are authenticated, and held in legally binding contracts, and we have a number of dataset protection features. If you are interested in hosting data on Mozilla Data Collective, please reach out to us at mozilladatacollective@mozillafoundation.org.


Who is behind Mozilla Data Collective?

We are backed and stewarded by Mozilla Foundation - the non-profit, movement-building, and philanthropy arm of Mozilla.