generate anything.
upload nothing.
BlobForge is a strict front-end utility. No databases, no tracking, and no usage limits. Everything is constructed directly inside your browser memory for absolute privacy and zero latency.
▶ start generatingFree. Forever.
No account. No trial. No rate limits.
Generate as many files as you need.
No cloud. No server. Just your CPU.
14 file types.
One tool.
Binary, CSV, JSON, XML, YAML, SQL, PDF, Images, and more added regularly.
Guides & Deep Dives
Practical tutorials for QA engineers, developers, and DevOps teams.
The Ultimate Guide to QA Test Data Generation
Modern approaches to generating realistic test data for software testing, database seeding, and QA workflows.
12 min read →GuideDatabase Seeding: A Developer's Complete Handbook
Best practices for development, staging, and production database seeding — with code examples.
10 min read →ComplianceGDPR-Safe Test Data Generation for Developers
Generate synthetic data that maintains privacy compliance while remaining realistic for testing.
6 min read →Every workflow that needs test files, covered.
Generate specific formats tailored to your testing infrastructure.
File Upload Testing
Generate binary files of exact sizes to test upload limits, file type validation, and large-file error handling.
Database Seeding
Create CSV and JSON datasets with thousands of realistic fake records for PostgreSQL, MongoDB, and MySQL.
API Mocking
Generate JSON payloads with realistic fake data for REST API mocking and frontend development without a backend.
Performance & Load Testing
Create large test files to stress-test application performance, memory handling, and processing limits.
CI/CD Test Artifacts
Generate consistent, reproducible test files for automated pipelines in GitHub Actions, Jenkins, and GitLab CI.
Bandwidth & Network Testing
Download binary files of specific sizes to measure throughput, validate CDN delivery, and test download logic.
Frequently Asked Questions
Everything you need to know about generating files locally.
Ready to generate test data?
No sign-up. No download. No server. Open the tool and generate.
⚡ Start Generating Filessystem status: all local · 0 servers · 0 tracking