Free Online Developer Tools
A growing collection of fast, free, privacy-friendly tools that help developers and creators work more efficiently.
Featured Tool
OG Checker
Preview and validate Open Graph metadata before sharing your website.
- Preview social cards
- Validate Open Graph tags
- Check og:image
- Mobile friendly
og:title · og:description · og:image
All Tools
A growing toolbox for developers and creators.
OG Checker
Preview and validate Open Graph metadata before sharing your website.
Markdown Preview
Write Markdown and see it rendered live.
JSON Formatter
Format, validate and beautify JSON instantly.
UUID Generator
Generate v4 UUIDs in bulk.
JWT Decoder
Decode and inspect JWT tokens safely in your browser.
Regex Tester
Test regular expressions with live matches.
QR Generator
Create QR codes from any text or URL.
Base64 Tool
Encode and decode Base64 strings.
Why Choose Us
Built for developers who value speed, privacy, and simplicity.
Fast
Runs instantly in your browser.
Privacy First
No unnecessary data collection.
Completely Free
No login required.
Frequently Asked Questions
Everything you need to know about our tools.
What is OG Checker?+
OG Checker is a free online tool that lets you preview and validate Open Graph metadata for any URL. It shows how your page will look when shared on social platforms like Facebook, Twitter, and Slack.
Is this website free?+
Yes, all tools on this website are completely free to use. There are no hidden fees, subscriptions, or premium tiers.
Do I need an account?+
No account is required. All tools run directly in your browser with no sign-up needed.
Are my URLs stored?+
No. We do not store or log the URLs you inspect. Your data stays private and is processed only for the duration of your session.
Will more tools be added?+
Yes! We are actively building more developer tools including JSON Formatter, UUID Generator, JWT Decoder, and more. Check back soon or explore the tools grid for upcoming releases.