CoderTools.io

Free Online Developer Tools for Everyday Workflows

Fast, privacy-conscious utilities for CSV, JSON, YAML, XML, Base64, JWT, and UUID - designed to run in your browser.

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JSON to CSV Converter Free online — Excel & Sheets CSV to JSON Converter Free online — API-ready JSON JSON Beautifier Pretty-print & validate

CoderTools.io gives you fast, privacy-conscious utilities to convert, format, and generate data directly in your browser. No accounts required - lightweight tools built for developers, analysts, QA engineers, and automation scripts. See our privacy policy for how data is handled.

JSON to CSV Converter

Free online JSON to CSV converter for Excel and Google Sheets. Paste JSON, copy CSV instantly.

CSV to JSON Converter

Free online CSV to JSON converter. Paste CSV and get clean JSON for APIs, configs, or test data.

JSON Beautify & Validate

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

XML to JSON

Turn legacy XML payloads into JSON for modern services.

YAML to 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.

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JSON Formatting Best Practices CSV to JSON Guide Base64 Encoding Guide JWT Security Guide
No signup Browser-based tools Lightweight and fast Built for developers

Frequently Asked Questions

Are CoderTools.io tools free?
Yes. All tools on this site are free to use with no account required.
Is my data private?
Many tools process input in your browser and are not designed to upload tool input to a CoderTools.io backend. Site analytics and infrastructure logs may still apply - see our privacy policy.
Do I need to install anything?
No. Open a tool in your browser, paste or type your data, and copy the result.
Can I use these tools offline?
After the page loads once, many tools work without an active connection for basic tasks.