Open-source data-generation software

327 open-source libraries, tools and applications tagged data-generation, ranked by how closely data-generation is their primary purpose, then by adoption and maintenance health. Each entry links to a page with sources, use cases and when to choose or avoid it.

327 products, primary matches first, then adoption-weighted; health v2 shown.

Product	Health v2	Stars	Maturity
career-ops Career‑Ops is an open‑source AI‑powered job‑search system that runs locally in your terminal. It scans job portals, evaluates listings, tai…	82	73985	active
NanmiCoder/MediaCrawler MediaCrawler is a Python-based multi-platform social media crawler that scrapes notes, videos, posts, and comments from Xiaohongshu, Douyin…	72	65481	active
ai/nanoid Nano ID is a tiny (118 bytes), dependency-free JavaScript library for generating secure, URL-friendly unique string IDs using a hardware ra…	98	27084	stable
huggingface/open-r1 Open R1 is Hugging Face's fully open reproduction of the DeepSeek-R1 training pipeline, providing scripts for supervised fine-tuning, GRPO …	65	26481	active
mxgmn/WaveFunctionCollapse A C# implementation of the Wave Function Collapse algorithm that generates bitmaps and tilemaps locally similar to a single example input, …	52	25341	stable
Builder.io A Node.js/TypeScript crawler that scrapes one or more websites and generates knowledge files (JSON) for creating custom GPTs or OpenAI assi…	28	22405	active
Faker Faker is a Python library that generates realistic fake data such as names, addresses, and text. It is commonly used to seed databases, cre…	95	19447	stable
Faker Faker is a TypeScript library for generating massive amounts of realistic fake data such as names, addresses, dates, and financial records …	92	15518	stable
ConardLi/easy-dataset Easy Dataset is a self-hosted web application for building high-quality structured datasets for LLM fine-tuning, RAG, and model evaluation.…	66	14989	active
faker-ruby/faker A Ruby library for generating realistic fake data such as names, addresses, emails, phone numbers, and finance details. It supports over 40…	86	11937	stable
pathwaycom/arc-task-gen A Python tool that generates original ARC-AGI-1-style puzzle tasks distribution-matched to the public evaluation set. It produces tasks in …	53	11149	active
x-hw/amazing-qr A Python library and CLI tool (amzqr) that generates QR codes, including artistic black-and-white or colorized QR codes merged with picture…	75	10831	active
bchavez/Bogus Bogus is a fake data generator library for .NET languages (C#, F#, VB.NET), ported from faker.js with a FluentValidation-inspired fluent AP…	54	9740	active
dataabc/weiboSpider A Python command-line crawler that scrapes posts and profile data from Sina Weibo users, writing results to txt/csv/json files or MySQL/Mon…	58	9733	active
Builder.io GPT Crawler is a TypeScript‑based CLI that crawls websites, extracts content, and formats it into knowledge files for OpenAI custom GPTs. I…	94	8862	active
thoughtbot/factory_bot factory_bot is a Ruby library for defining and building test data objects with a straightforward factory definition syntax. It supports mul…	83	8169	stable
stanfordnlp/GloVe Stanford's C implementation of the GloVe model for training distributed word representations (word embeddings), plus downloadable pre-train…	34	7230	stable
davidmerfield/randomColor A tiny JavaScript library that generates attractive random colors, with options to control hue, luminosity, count, seed, and output format.…	48	6120	stable
brianvoe/gofakeit Gofakeit is a random fake data generator library for Go offering 310+ functions for names, emails, phones, companies, credit cards, and mor…	71	5395	stable
Mimesis Mimesis is a Python library for generating fake but realistic data across 47 locales, covering names, addresses, dates, financial data, and…	98	4851	stable
dataabc/weibo-crawler A Python crawler for Sina Weibo that scrapes user profiles and posts, exporting data to CSV, JSON, MySQL, MongoDB, or SQLite, and optionall…	70	4663	active
focus-creative-games/luban Luban is a powerful, stable game configuration pipeline tool that reads data from Excel/CSV/JSON/XML/YAML/Lua sources and generates typed c…	97	4624	active
rom1504/img2dataset A Python tool that downloads large sets of image URLs and packages them into machine learning datasets, with resizing and caption support. …	52	4454	active
nuysoft/Mock Mock.js is a JavaScript library that generates simulated random data from data templates and intercepts Ajax requests to return mock respon…	23	19571	maintenance
Node.js CSV A mature monorepo of Node.js and browser packages (csv-generate, csv-parse, stream-transform, csv-stringify) for generating, parsing, trans…	76	4283	stable
Agent Game Forge Agent Sprite Forge is a Codex agent skill for generating game-ready 2D assets from natural language prompts. It produces sprite sheets, lay…	52	4274	active
iztro A lightweight, multilingual TypeScript/JavaScript library for generating Zi Wei Dou Shu (Purple Star Astrology) natal charts and horoscope …	92	4196	active
nghuyong/WeiboSpider A continuously maintained Python web scraping tool for Sina Weibo built on Scrapy and the new weibo.com API. It collects user profiles, pos…	69	4119	active
fake-useragent/fake-useragent A Python library that generates realistic, up-to-date browser user-agent strings from a bundled real-world database. It supports random or …	10	4049	active
JioNLP JioNLP is a Python library for Chinese NLP preprocessing and parsing, offering utilities like time semantic parsing, license plate parsing,…	77	3873	active
FactoryBoy/factory_boy factory_boy is a Python test fixtures replacement inspired by Ruby's factory_bot. It lets developers define declarative factories for creat…	56	3811	stable
Belval/TextRecognitionDataGenerator A Python library and CLI tool (trdg) that generates synthetic text images for training OCR and text recognition models. It supports multipl…	23	3696	stable
menzi11/BullshitGenerator A JavaScript-based generator of nonsensical Chinese filler text ('BullshitGenerator') intended for testing GUI text rendering. It assembles…	32	15502	maintenance
sdv-dev/SDV SDV (Synthetic Data Vault) is a Python library for generating synthetic tabular data using machine learning models ranging from GaussianCop…	98	3572	stable
AutoFixture/AutoFixture AutoFixture is an open-source .NET library that automates the creation of test data and object graphs, minimizing the 'Arrange' phase of un…	81	3540	stable
omkarcloud/google-maps-scraper A desktop application and API for scraping Google Maps business data, extracting 50+ data points including emails, phone numbers, social pr…	73	3538	active
Auburn/FastNoiseLite FastNoise Lite is a highly portable noise generation library offering 2D/3D Perlin, OpenSimplex2, Cellular (Voronoi), Value, and Cubic nois…	59	3527	stable
imgaug imgaug is a Python library for augmenting images in machine learning experiments, converting a small set of input images into a much larger…	23	14744	maintenance
Mozilla Common Voice Mozilla Common Voice is a web platform for crowdsourcing voice donations to build public-domain speech datasets for training voice recognit…	99	3493	active
json-schema-faker/json-schema-faker A JavaScript library that generates valid, realistic fake JSON data from JSON Schema definitions, supporting JSON Schema 2019-09 and 2020-1…	86	3447	active
jsvine/markovify Markovify is a simple, extensible Python library for building Markov chain models from text corpora and generating random semi-plausible se…	32	3409	stable
IPTV A Node.js tool that downloads Electronic Program Guide (EPG) data for thousands of TV channels from hundreds of sources and outputs it as X…	77	3388	active
oxylabs/google-news-scraper A free Python-based command-line tool from Oxylabs that scrapes Google News articles by topic, exporting headlines, URLs, and publication d…	61	3381	active
synthetichealth/synthea Synthea is an open-source synthetic patient population simulator that generates realistic but not real patient health records. It models pa…	84	3366	active
Wisser/Jailer Jailer is a Java-based tool for database subsetting and relational data browsing. It extracts small, referentially intact slices of product…	98	3205	active
thoughtbot/factory_bot_rails factory_bot_rails provides Rails integration for Factory Bot, a fixtures replacement library for defining test data with a straightforward …	64	3139	stable
Eladlev/AutoPrompt AutoPrompt is a Python framework for optimizing LLM prompts using Intent-based Prompt Calibration. It iteratively generates challenging edg…	39	3017	active
calebporzio/sushi Sushi is a PHP library that lets Laravel Eloquent models run on in-memory array data instead of a database, backed by SQLite. You add a tra…	58	3008	active
rtivital/omatsuri Omatsuri is a progressive web application bundling 12 open-source frontend-focused tools such as CSS generators, SVG compression/conversion…	50	2972	active
Ovi/DummyJSON DummyJSON is a free hosted fake REST API that serves placeholder JSON data (products, users, carts, posts, quotes, todos, recipes) for fron…	75	2929	active
RoboTwin-Platform/RoboTwin RoboTwin 2.0 is a scalable benchmark and data-generation platform for bimanual (dual-arm) robotic manipulation, built on simulated digital …	66	2914	active
orangehill/iseed iSeed is a Laravel package that generates database seed files from existing database table data via an Artisan command. It supports Laravel…	86	2896	active
doctrine/data-fixtures Doctrine Data Fixtures is a PHP library for managing and loading data fixtures into databases via the Doctrine ORM or ODM. It provides a fi…	85	2851	stable
google-research/kubric Kubric is a data generation pipeline from Google Research for creating semi-realistic synthetic multi-object videos with rich annotations l…	57	2839	active
kerrickstaley/genanki A Python 3 library for programmatically generating Anki flashcard decks (.apkg files), including notes, models, decks, and media files. It …	32	2740	stable
nelmio/alice Nelmio Alice is a PHP library for generating expressive fixtures and fake data, built on top of FakerPHP. It lets developers define complex…	74	2538	active
tobiabocchi/flipperzero-bruteforce A Python script that generates .sub files for brute-forcing fixed OOK code subghz protocols using a Flipper Zero device. It supports multip…	32	2529	active
hitsz-ids/synthetic-data-generator SDG (Synthetic Data Generator) is a Python framework for generating high-quality synthetic structured tabular data using deep learning, GAN…	75	2440	active
NVIDIA-NeMo/DataDesigner NeMo Data Designer is an open-source Python orchestration framework from NVIDIA for generating high-quality synthetic datasets from scratch…	85	2354	active
iver56/audiomentations Audiomentations is a Python library for audio data augmentation with an API inspired by albumentations. It provides fast CPU-based waveform…	61	2323	stable
Dynamic Prompts An extension for AUTOMATIC1111's stable-diffusion-webui that adds a template language for random and combinatorial prompt generation using …	32	2292	active
benkeen/generatedata Generatedata is a self-hosted web application and engine for generating random test data in many formats such as CSV, SQL, and JSON. It shi…	86	2285	active
holynova/gushi_namer A web application that generates Chinese baby names by combining characters from classical texts like the Book of Songs, Chu Ci, Tang poems…	91	2256	active
daimon3332/address A self-hosted web application that generates realistic residential addresses and synthetic test profiles for 27 countries and regions, buil…	81	2226	active
onthegomap/planetiler Planetiler is a Java-based tool that generates vector tilesets (MBTiles or PMTiles) from OpenStreetMap and other geographic data sources. I…	85	2213	active
gelstudios/gitfiti gitfiti is a Python CLI tool that draws pixel art on your GitHub contribution calendar by generating backdated git commits. It produces a b…	32	8450	maintenance
op7418/logo-generator-skill A Claude Code skill that generates professional SVG logos in 6+ design variants and produces high-end showcase images using Gemini 3.1 Flas…	46	2134	active
yuanzl77/IPTV A Python tool that aggregates IPTV live streaming sources daily, validates them with HTTP checks and FFprobe quality probing, and generates…	69	2122	active
peteromallet/dataclaw DataClaw is a CLI tool and macOS menu-bar app that parses coding-agent conversation history (Claude Code, Codex, Gemini CLI, etc.), redacts…	76	2114	active
rust-embedded/heapless A Rust crate providing `static`-friendly data structures (vectors, queues, maps, etc.) that don't require dynamic memory allocation. It is …	80	2023	stable
KEV0143/Parser-Chitai-Gorod A Python-based scraper for the Russian online bookstore Chitai-Gorod that collects book URLs across catalog pages and extracts structured p…	72	1980	active
typelevel/scalacheck ScalaCheck is a property-based testing library for Scala and Java programs, inspired by Haskell's QuickCheck. It generates test cases autom…	85	1964	stable
starik222/BooruDatasetTagManager A desktop tag editor for managing booru-style tagged image and video datasets used to train Stable Diffusion models such as LoRAs, embeddin…	70	1947	active
zanwei/design-dna An agent skill that extracts a machine-readable 'Design DNA' JSON profile (design tokens, qualitative style, and visual effects) from refer…	56	1875	active
425776024/nlpcda nlpcda is a Python library for one-click Chinese NLP data augmentation. It provides techniques like random entity replacement, synonym subs…	25	1875	active
e-p-armstrong/augmentoolkit Augmentoolkit is a Python application that generates domain-expert fine-tuning datasets from uploaded documents and trains custom LLMs on t…	65	1872	active
fent/randexp.js A JavaScript library that generates random strings matching a given regular expression. It supports grouping, ranges, references, custom ch…	67	1866	stable
davyxu/tabtoy Tabtoy is a high-performance command-line tool that exports spreadsheet data (Xlsx/CSV) into JSON, binary, and source code for Golang, C#, …	23	1854	active
simplex-noise A fast, dependency-free simplex noise library in JavaScript/TypeScript supporting 2D, 3D, and 4D noise with optional seeding via a custom P…	23	1850	stable
datafaker-net/datafaker Datafaker is a JVM library for generating fake data in Java, Kotlin, and Groovy, offering 250+ data providers covering names, addresses, da…	90	1803	active
DataArcTech/DataArc-SynData-Toolkit DataArc SynData Toolkit is a Python-based synthetic data generation platform for creating customized LLM training data from local corpora, …	59	1783	active
Chance Chance is a minimalist JavaScript library for generating random strings, numbers, names, addresses, dates, and other data, built on a seeda…	39	6533	maintenance
MikeMirzayanov/testlib A C++ header-only library for building competitive programming problem infrastructure: checkers, validators, generators, and interactors. I…	64	1747	stable
sunny-glow/Auto-BenchMax Auto-BenchMax is a Python pipeline that automatically synthesizes benchmark-targeted training data for LLMs, claiming to more than double a…	52	1745	active
bespokelabsai/curator Bespoke Curator is a Python library for bulk LLM inference and scalable synthetic data curation for post-training and structured data extra…	89	1744	active
dgreenheck/ez-tree EZ-Tree is a procedural tree generator library for JavaScript and Three.js with dozens of tunable parameters, plus a standalone web app for…	71	1693	active
koaning/drawdata A Python library providing notebook widgets for drawing datasets interactively, built on anywidget. Drawn data can be exported as lists, pa…	67	1674	active
luogu-dev/cyaron CYaRon is a Python library for generating random test data for competitive programming and online judge problems. It can create random grap…	52	1666	stable
Data-Centric-AI-Community/fg-data-synthetic A Python library for generating synthetic tabular and time-series data using state-of-the-art generative models such as GANs (including CTG…	87	1659	active
huggingface/aisheets Hugging Face AI Sheets is an open-source no-code web application for building, enriching, and transforming datasets using AI models. It can…	64	1652	active
meta-llama/synthetic-data-kit A Python CLI tool from Meta for generating high-quality synthetic datasets to fine-tune LLMs. It follows a four-stage pipeline (ingest, cre…	39	1639	active
NVIDIA/RULER RULER is a benchmark framework from NVIDIA that generates synthetic test examples to measure the true effective context size of long-contex…	64	1619	active
ffaker/ffaker ffaker is a Ruby library for generating fake data such as names, emails, and addresses, originally created as a faster rewrite of the faker…	66	1572	stable
sdv-dev/CTGAN CTGAN is a Python library of deep learning based synthetic data generators for single-table tabular data, implementing the CTGAN conditiona…	76	1569	active
Bklieger/infinite-bookshelf Infinite Bookshelf is a Streamlit web app that generates entire nonfiction books from a one-line prompt using Llama models on Groq. It scaf…	32	1551	active
kudrykv/latex-yearly-planner A Go/LaTeX tool that generates yearly PDF planners designed for e-ink tablets like Supernote and ReMarkable. It produces pre-generated plan…	55	1532	active
litestar-org/polyfactory Polyfactory is a Python library that generates mock data from type hints, supporting frameworks like Pydantic, dataclasses, TypedDict, attr…	100	1516	active
huangserva/skill-prompt-generator A Claude Code Skills-based system that generates high-quality AI image prompts by intelligently combining elements from a 1,246-item Univer…	49	1506	active
JustAnotherArchivist/snscrape snscrape is a Python-based scraper for social networking services that extracts posts, profiles, hashtags, and search results from platform…	32	5464	maintenance
Aceinna/gnss-ins-sim A Python library for simulating GNSS/INS integrated navigation systems. It generates reference trajectories and synthetic IMU, GPS, odomete…	23	1493	active