Dev tools — free & private forever.
Generate UUIDs, QR codes, and convert JSON, CSV & YAML — right in your browser. Nothing uploaded, no account needed.
✓Runs locally
✓No account
✓No watermark
Browse all dev tools
Generate QR code
Create a QR code for a URL, text, Wi-Fi, or contact card, with custom colors and a logo.
Convert timestamp
Convert Unix timestamps to human-readable dates and back, with local/UTC/ISO 8601 output.
Generate UUID
Generate random UUID v4 identifiers, in bulk, with hyphens/uppercase/braces formatting.
Convert JSON, CSV & YAML
Convert JSON, CSV, and YAML in any direction — CSV and YAML convert through JSON automatically.