Developer tools

Use these free online developer tools to validate JSON, encode and decode values, convert dates and timestamps, generate hashes, sign payloads, generate keys and identifiers, inspect tokens, and debug common web application integration tasks.

Privacy note: Submitted values are processed only to produce the requested result and are not stored by these tools.

JSON Formatter & Validator

Validate, format, and minify JSON payloads for API debugging, logs, configuration files, fixtures, and documentation examples.

JWT Generator & Decoder

Create, decode, and verify JSON Web Tokens with common HMAC, RSA, and ECDSA algorithms for authentication and API testing.

Hash / HMAC Generator & Verifier

Generate hashes, sign payloads with HMAC secrets, and verify expected signatures for webhook and API debugging.

Base64 / URL Encoder & Decoder

Encode and decode Base64, URL-safe Base64, and URL components for API payloads, query strings, tokens, and integration tests.

Timestamp / Date Converter

Convert Unix timestamps, date strings, UTC values, and selected timezones with ISO 8601 and RFC 3339 output for API debugging.

UUID Generator

Generate UUID v1, v4, and v7 identifiers for databases, fixtures, distributed systems, API examples, and automated tests.

VAPID Keys Generator

Generate public and private VAPID keys used to authenticate application servers for browser Web Push notifications.

When to use these tools

They are designed for API debugging, authentication tests, JSON payload inspection, Base64 and URL encoding checks, timestamp and timezone checks, hash and HMAC checks, database fixtures, web push setup, and quick checks during Drupal, PHP, and JavaScript development.