CoderTools.io

Free Online Developer Tools for Everyday Workflows

CodeTools.io gives you fast, privacy-first utilities to convert, format, and generate data directly in your browser. No accounts, no servers, no data stored – just lightweight tools built for developers, analysts, QA engineers, and automation scripts.

CSV → JSON

Upload or paste CSV and instantly convert it to clean JSON for APIs, configs, or test data.

JSON → CSV

Flatten JSON into CSV for Excel, spreadsheets, or reporting pipelines.

JSON Beautify & Validate

Pretty-print and validate JSON for debugging, logs, and API responses.

XML → JSON

Turn legacy XML payloads into JSON for modern services.

YAML → JSON

Convert YAML config files into JSON for tools and automation.

Base64 Encode / Decode

Encode or decode Base64 for tokens, binary data, and integrations.

UUID Generator

Generate secure UUIDs for IDs, test data, and distributed systems.

JWT Decoder

Decode and inspect JWT tokens to view header, payload, and signature.