Datasets | Mozilla Data Collective

Mozilla Common Voice

Common Voice Spontaneous Speech 5.0 - English

A collection of spontaneous responses to questions in English.

License: CC0-1.0

Locale: en

Task: ASR

Format: MP3

Size: 519.05 MB

Mozilla Common Voice

Common Voice Scripted Speech 27.0 - English

A collection of read speech recordings in English.

License: CC0-1.0

Locale: en

Task: ASR

Format: MP3

Size: 88.43 GB

MDC Curators

Common Voice Scripted Speech 26.0 - Scottish English

A closed-form Scottish-English-accent subset of Mozilla Common Voice Scripted Speech 26.0 (English, validated). MP3 audio + TSV metadata.

License: CC0-1.0

Locale: en

Task: ASR

Format: TSV, MP3

Size: 770.74 MB

MDC Curators

Common Voice Scripted Speech 26.0 - South Asian English (India, Pakistan, Sri Lanka)

A closed-form South-Asian-English-accent subset of Mozilla Common Voice Scripted Speech 26.0 (English, validated). MP3 audio + TSV metadata.

License: CC0-1.0

Locale: en

Task: ASR

Format: TSV, MP3

Size: 3.83 GB

Effect AI

Effect AI Scripted Speech 1.0 - English

A collection of scripted spoken phrases in English.

License: CC0-1.0

Locale: en

Task: TTS

Format: CSV, MP3

Size: 663.45 MB

AImpower.org

English Stuttered Speech

The dataset include 39 hours of transcribed and annotated conversational and voice command reading speech from 45 English speakers who stutter.

License: CC-BY-SA-4.0

Locale: en

Task: ASR

Format: WAV, TXT

Size: 9.75 GB

MDC Community Concierge

The LJSpeech Dataset

This is a public domain speech dataset consisting of 13,100 short audio clips of a single speaker reading passages from 7 non-fiction books.

License: CC0-1.0

Locale: en

Task: TTS

Format: WAV, TSV

Size: 3.00 GB

MDC Community Concierge

Speech Corpus of English Learners from Mexico

A corpus of read speech by learners of English living in Mexico.

License: CC-BY-SA-4.0

Locale: en

Task: ASR

Format: MP3, TSV

Size: 201.79 MB

Community

IndoLearner-English Speech Corpus

A corpus of read speech by learners of English language from Indonesia.

License: CC-BY-SA-4.0

Locale: en

Task: CALL

Format: WAV, WEBM, TSV

Size: 1.66 GB

Community

Indonesian-Learner-English

A corpus of English read speech by Indonesian learners.

License: CC-BY-NC-SA-4.0

Locale: en

Task: CALL

Format: WAV, WEBM, TSV

Size: 1.12 GB

Bahasa Bahana

BAHANA-Speech Corpus of English Learners from Indonesia

A corpus of read speech by learners of English from Indonesia.

License: CC-BY-SA-4.0

Locale: en

Task: CALL

Format: WEBM, WAV, TSV

Size: 1.14 GB

FHIBE

FHIBE Face Crop Align

Cropped and aligned FHIBE face images with key landmarks normalized across samples.

License: FHIBE Term of Use

Locale: en

Task: CV

Format: PNG, JSON, CSV

Size: 2.79 GB

FHIBE

FHIBE Downsampled Overlays

FHIBE Downsampled images with bounding boxes, masks, or keypoints overlaid for visualization.

License: FHIBE Term of Use

Locale: en

Task: CV

Format: PNG

Size: 128.59 GB

FHIBE

FHIBE Face Crop Only

FHIBE face crops created directly from full-resolution images.

License: FHIBE Term of Use

Locale: en

Task: CV

Format: PNG, JSON, CSV

Size: 10.63 GB

FHIBE

FHIBE Downsampled

Lower-resolution FHIBE images and pixel-level annotations, resized to fit within a 2048-pixel longest side.

License: FHIBE Term of Use

Locale: en

Task: CV

Format: PNG, JSON, CSV

Size: 44.04 GB

FHIBE

FHIBE Full Resolution

Original FHIBE images and pixel-level annotations at full resolution.

License: FHIBE Term of Use

Locale: en

Task: CV

Format: PNG, JSON, CSV

Size: 135.58 GB

FHIBE

FHIBE Metadata

Metadata files for the FHIBE dataset variants.

License: FHIBE Term of Use

Locale: en

Task: CV

Format: PNG, JSON, CSV, TXT

Size: 3.88 GB

0DIN by Mozilla

Public GenAI Vulnerability Disclosures

Weekly export of 0DIN's public GenAI vulnerability disclosures: jailbreaks, prompt injection, content manipulation, and other model-security findings.

License: CC-BY-4.0

Locale: en

Task: N/A

Format: JSONL

Size: 116.26 KB

Brett Williams Studios LLCCompensated

🚧 Hitch Hiker 'Mirror Suit' Robotics Data 🚧

High-specularity optical edge-case dataset (425 assets) for benchmarking computer vision and autonomous navigation against severe specular reflections.

License: LICENSE.md

Locale: en

Task: CV

Format: NEF, JPEG

Size: 4.47 GB

Taruen

World Factbook (JSON)

A machine-readable JSON archive of the CIA World Factbook (Jan 2026 snapshot). Includes both standard developer and raw cache versions with image metadata.

License: CC0-1.0

Locale: en

Task: NLP

Format: JSON

Size: 7.10 MB

PROXIMA

Pakistan HSSC-I Mathematics Dataset

Instruction-following dataset of Pakistan HSSC-I (Grade 11) mathematics problems in Parquet format for educational AI, NLP, question answering, and research.

License: CC-BY-NC-SA-4.0

Locale: en

Task: LLM

Format: PARQUET

Size: 105.73 KB

fastdol.com

Public Company Federal Compliance Records — Q3 2026

Federal workplace enforcement (OSHA, WHD, NLRB, EPA, SAM) joined to SEC parent financials for 103,974 establishments at 1,826 public companies.

License: CC-BY-4.0

Locale: en

Task: OTH

Format: csv

Size: 2.74 MB

fastdol.com

Cross Agency Federal Violations by Company

Federal enforcement records from 16 U.S. agencies joined at the employer level, with cross-agency violations, penalties, and parent-company rollup.

License: CC-BY-4.0

Locale: en

Task: N/A

Format: CSV

Size: 2.78 MB

Community

Advanced Geometrical Optics and Magnetism Problems and Solutions

Advanced physics problems with detailed solutions covering geometrical optics, mirrors, lenses, refraction, dispersion, and magnetism.

License: APDL-1.0

Locale: en

Task: LLM

Format: JSONL

Size: 3.08 MB

All Datasets

Common Voice Spontaneous Speech 5.0 - English

Common Voice Scripted Speech 27.0 - English

Common Voice Scripted Speech 26.0 - Scottish English

Common Voice Scripted Speech 26.0 - South Asian English (India, Pakistan, Sri Lanka)

Effect AI Scripted Speech 1.0 - English

English Stuttered Speech

Weekly dataset digest

The LJSpeech Dataset

Speech Corpus of English Learners from Mexico

IndoLearner-English Speech Corpus

Indonesian-Learner-English

BAHANA-Speech Corpus of English Learners from Indonesia

FHIBE Face Crop Align

FHIBE Downsampled Overlays

FHIBE Face Crop Only

FHIBE Downsampled

FHIBE Full Resolution

FHIBE Metadata

Public GenAI Vulnerability Disclosures

🚧 Hitch Hiker 'Mirror Suit' Robotics Data 🚧

World Factbook (JSON)

Pakistan HSSC-I Mathematics Dataset

Public Company Federal Compliance Records — Q3 2026

Cross Agency Federal Violations by Company

Advanced Geometrical Optics and Magnetism Problems and Solutions