Datasets | Mozilla Data Collective

All Datasets

Compensated Datasets

API

Contribute Datasets

Loading datasets...

Terms

FAQs

Participation Guidelines

Responsible Disclosure

News and Documentation

Data and Model Competitions

[email protected]

Terms

FAQs

Participation Guidelines

Responsible Disclosure

News and Documentation

Data and Model Competitions

[email protected]

Mozilla Data Collective is a mission-locked British company, incubated by Mozilla Foundation, and backed by the not-for-profit Mozilla.org

All Datasets

1,200 Datasets

Jamuna Printing and Publishing Ltd.

The Daily Jugantor Bengali Language Corpus

Monolingual Bengali corpus of 10.6 million words from Daily Jugantor, a major Bengali news source.

License: CC-BY-NC-SA-4.0

Locale: ben

Task: NLP

Format: DOCX

Size: 40.49 MB

Community

CV Korean Test 25.0 - Noise-Augmented (SCAI)

A noise-augmented version of the Mozilla Common Voice Korean test split for robust ASR evaluation under realistic acoustic conditions.

License: CC0-1.0

Locale: ko

Task: ASR

Format: MP3, JSONL

Size: 21.01 MB

Collaborative Action For Research & Development (CARD)

IBT Torwali Literature Corpus

A Torwali literature corpus (~233K tokens) covering poetry, folklore, biographies, and cultural texts for linguistic research and NLP development.

License: CC-BY-NC-4.0

Locale: trw

Task: NLP

Format: TXT

Size: 488.12 KB

Institute of African Digital Humanities

Bulu_ALCAM-MultimodalDataset

Bulu ALCAM multimodal dataset: lexical entries and example sentences in Bulu (IPA) with French equivalents, audio recordings, and alignment file.

License: NOODL-1.0

Locale: bum

Task: NLP

Format: MP3, TSV

Size: 31.28 MB

Institute of African Digital Humanities

Hausa-TTS-Dataset

This dataset consists of segmented Hausa speech audio clips paired with text, totalling 5h 25m and 38s.

License: NOODL-1.0

Locale: hau

Task: TTS

Format: MP3, TSV

Size: 276.90 MB

MirasAI

Tamil Time Aligned Speech Dataset

5-hour Tamil speech dataset with time-aligned transcripts, designed for ASR, forced alignment, subtitle generation, and speech-language research.

License: CC-BY-NC-SA-4.0

Locale: tam

Task: ASR

Format: OGG, SRT

Size: 37.11 MB

MDC Curators

ViQua² — Visual Question-answering about Quantities

Multimodal evaluation dataset for quantity-based visual question answering.

License: CC-BY-SA-4.0

Locale: en-US

Task: CV

Format: JSON, JPEG

Size: 281.05 MB

Institute of African Digital Humanities

Bamun-TTS-Dataset (male voice)

This dataset consists of segmented Bamun (Shupamem) speech audio clips paired with text, designed for Text-to-Speech (TTS) applications.

License: NOODL-1.0

Locale: bax

Task: TTS

Format: MP3, TSV

Size: 219.97 MB

GriôTech

Territórios Digitais

Dataset on community-driven responses to disinformation and AI in marginalized territories in Brazil, based on participatory research.

License: CC-BY-4.0

Locale: pt, en

Task: N/A

Format: DOCX, PDF, XLSX

Size: 4.24 MB

Taruen

Chuvash TTS

A ~5-hour speech dataset for Chuvash Text-to-Speech (TTS) research, featuring a single female speaker reading news and digits at a rapid tempo.

License: CC-BY-SA-4.0

Locale: cv

Task: TTS

Format: PARQUET

Size: 854.02 MB

RFE/RL

RFE/RL Persian News Text Corpus

This dataset is a longitudinal news corpus for the Persian language sourced from Radio Farda from 2001 to 2026. It contains over 350,000 articles (51M tokens).

License: CC-BY-NC-SA-4.0

Locale: fa

Task: NLP

Format: TXT

Size: 307.78 MB

MirasAI

Saraiki 10 Hours TTS Dataset

A 10-hour Saraiki text-to-speech dataset consisting of recorded speech and aligned transcripts, designed for speech synthesis research and development.

License: CC-BY-NC-SA-4.0

Locale: srk

Task: TTS

Format: WEBM, TSV

Size: 584.44 MB

MirasAI

Kannada Time Aligned Speech Corpus

A 5-hour Kannada speech dataset with time-aligned transcriptions, designed for ASR, forced alignment, and speech research.

License: CC-BY-NC-SA-4.0

Locale: kan

Task: ASR

Format: OGG, SRT

Size: 355.77 MB

MDC Curators

Sentence translation difficulty in Spanish - BOUQuET

A collection of sentences in Spanish from the BOUQuET benchmark (total 1990 sentences) which have been annotated with sentence translation difficulty scores.

License: CC-BY-SA-4.0

Locale: es

Task: MT

Format: TSV

Size: 55.83 KB

Institute of African Digital Humanities

Yezoum_ALCAM-MultimodalDataset

This dataset comprises aligned audio and text data in Yezoum with French equivalents.

License: NOODL-1.0

Locale: ewo

Task: NLP

Format: MP3, TSV

Size: 12.81 MB

Institute of African Digital Humanities

Bamun-French Parallel Corpus 2.0

This dataset is an extended and updated version of the "Bamun-French Parallel Corpus 1.1", a parallel corpus of 4,444 lines in Bamun and French.

License: NOODL-1.0

Locale: bax

Task: MT

Format: TSV

Size: 184.29 KB

Community

Araina Text Corpus (Occitan Aranese)

Text corpus in Aranese variety of Gascon dialect of Occitan

License: CC0-1.0

Locale: oc

Task: LM

Format: txt

Size: 22.97 MB

MDC Curators

Corpus de llenguatge ofensiu en català

This dataset consists of sentences tagged as offensive-language in the version 25.0 release of Mozilla Common Voice in Catalan.

License: CC-BY-SA-4.0

Locale: ca

Task: NLP

Format: TSV

Size: 57.35 KB

Community

Oro_Word

Afaan Oromoo word-level speech dataset collected to support open-source speech recognition and text-to-speech technology.

License: CC0-1.0

Locale: om

Task: TTS

Format: .WAV, CSV

Size: 1.28 MB

Institute of Finno-Ugric/Uralic Studies, University of Hamburg

INEL Kalmyk Speech Corpus

A 3-hour supervised Speech-to-Text dataset for Kalmyk, a Mongolic language. Features sentence-level audio aligned with scientific text transcriptions.

License: CC-BY-NC-SA-4.0

Locale: xal

Task: ASR

Format: TSV, MP3

Size: 138.31 MB

Institute of Finno-Ugric/Uralic Studies, University of Hamburg

INEL Nganasan Speech Corpus

A 38.5-hour Speech-to-Text dataset for Nganasan, an endangered Samoyedic language. Features audio aligned with text transcriptions.

License: CC-BY-NC-SA-4.0

Locale: nio

Task: ASR

Format: TSV, MP3

Size: 1.29 GB

Institute of Finno-Ugric/Uralic Studies, University of Hamburg

INEL Evenki Speech Corpus

A 2.5-hour supervised Speech-to-Text dataset for Evenki, an endangered Tungusic language. Features sentence-level audio aligned with text transcriptions.

License: CC-BY-NC-SA-4.0

Locale: evn

Task: ASR

Format: TSV, MP3

Size: 103.03 MB

Institute of Finno-Ugric/Uralic Studies, University of Hamburg

INEL Dolgan Speech Corpus

A 13-hour supervised Speech-to-Text dataset for Dolgan, an endangered Turkic language. Features sentence-level audio aligned with text transcriptions.

License: CC-BY-NC-SA-4.0

Locale: dlg

Task: ASR

Format: TSV, MP3

Size: 583.34 MB

Institute of Finno-Ugric/Uralic Studies, University of Hamburg

INEL Kamas Speech Corpus

A 14-hour Speech-to-Text dataset for Kamas, an extinct Samoyedic language waiting to be revitalized. Features audio aligned with text transcriptions.

License: CC-BY-NC-SA-4.0

Locale: xas

Task: ASR

Format: TSV, MP3

Size: 376.64 MB