Free developer tools built for speed and privacy.
Browse free utilities for developers, founders, and operators. All tools run in your browser - your data stays private.
JSON Tools
View all JSON tools →JSON Formatter
Prettify, minify, and format JSON with custom indentation.
JSON Validator
Validate JSON syntax and find errors with detailed messages.
JSON to CSV
Convert JSON arrays to CSV format instantly.
JSON Diff
Compare two JSON documents and find differences.
JSON Schema
Generate JSON Schema from sample data.
Dev Tools
Data Tools
YC Companies
Search, filter, and export every YC company across all batches, industries, and regions.
More tools in the pipeline
Deeper YC benchmarks, startup hiring insights, and AI infra benchmarks coming soon.
Just For Fun
Developer Velocity
An interactive developer velocity visualization — lines of code shipped over time, commit cadence, and the weekly rhythm across engineering teams. Aggregate, anonymized, and just for fun.
More fun visualizations
Interactive data toys built from the patterns we see across thousands of test runs and pull requests.
Founders Tools
View all founder tools →GTM Channel Analyzer
Score and rank 24 go-to-market channels based on your startup's specific situation. Get a prioritized roadmap for customer acquisition.
More founder tools
Pricing calculator, runway planner, TAM/SAM/SOM calculator, and competitive analysis templates coming soon.