viu Developer Tools

Quick in-browser utilities for common data formats and tokens.

Base64 Encoder / Decoder

Encode or decode text and files using Base64, with URL-safe and padding options.

Open Base64 Tool

JSON Extractor / Formatter

Automatically detect, format, and highlight JSON inside any pasted text.

Open JSON Tool

XML Beautifier / Viewer

Pretty-print or minify XML, highlight syntax, and explore structure as a tree.

Open XML Tool

JWT Reader

Decode and inspect JWTs directly in your browser — see headers, payloads, and claims safely.

Open JWT Reader

GUID Generator

Create secure random UUID v4 identifiers — copy with one click.

Open GUID Generator

URL Encoder / Decoder

Convert text to and from URL-safe encoding — handle special characters and emojis safely.

Open URL Tool

JSON Comparer

Compare JSONs to quickly see differences in Request / Responses.

Open JSON Compare Tool