Fast & Free Developer Tools

RunTools.devAll-in-one Developer Tools

Free online developer tools: Base64, Timestamp, DNS, JWT Decoder and more.

Popular Tools

Quick access to the most-used utilities by developers.

Convert Unix Timestamp to Date and vice versa.

Encode and Decode Base64 data.

Convert JSON arrays into CSV, TSV, HTML, or XML.

Generate UUID v4 or ULID identifiers in bulk.

Perform DNS lookups (A, MX, TXT, etc.) for any domain.

Decode JSON Web Tokens (JWT) locally.

Use tools immediately without an account, with shortcuts and a clean interface to stay in flow.

Most tools run entirely in your browser; network requests are used only when the task needs them.

Localized interface and paths so everyone on your team feels at home.

Covers day-to-day helpers like Base64, timestamps, JWT decode, and DNS lookup in one place.