About DevKit

DevKit is a workspace of small, fast utilities for the data developers handle every day: JSON, tokens, timestamps, encodings, queries and text.

Principles

• The tool comes first. No sign-up, onboarding or cookie walls.
• Your data stays on your device. Tools marked “Processed locally in your browser” never send your input anywhere.
• Deterministic tasks are done deterministically — no AI where an algorithm is exact.
• Clear, specific error messages instead of “invalid input”.