Free Developer Tools
Fast, privacy-focused utilities that run entirely in your browser. No data leaves your machine.
TOTP Generator
Generate secrets, QR codes, and test 2FA codes. Supports SHA-1/256/512 algorithms.
Open tool →BPM to Delay
Convert tempo to delay times in milliseconds. Includes tap tempo and all note values.
Open tool →Base Encoder
Encode and decode Base16, 32, 45, 58, 62, 64, 85. Compare all formats instantly.
Open tool →Hash Generator
Generate hashes with SHA-3, BLAKE2, SHA-256, MD5. Hash text or files, verify checksums.
Open tool →Context Visualizer
Visualize LLM token usage. Plan your context budget for GPT-4, Claude, and more.
Open tool →Lightning Fast
No server round-trips. Everything runs locally.
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Your data never leaves your browser.
Free Forever
No signup, no limits, no tracking.