Data & Encoding Tools
Encode, decode, and convert between data formats with our free browser-based encoding tools. The collection includes a Base64 Encoder and Decoder for binary-to-text conversion, a URL Encoder and Decoder for query string handling, an HTML Entity Encoder for safe markup rendering, a Number Base Converter for binary, octal, decimal, and hex conversions, plus format converters for XML-to-JSON, JSON-to-YAML, and CSV-to-JSON transformations. All encoding tools run 100% client-side — your data stays in your browser and is never transmitted to any server. This is critical when working with API payloads, authentication tokens, or configuration data that may contain sensitive information. Fast, focused, and private.
6 tools available
What You'll Find
This collection includes Base64 Encoder / Decoder for encode text to base64 or decode base64 strings instantly in your browser, URL Encoder / Decoder for encode and decode urls and query parameters with support for encodeuricomponent and encodeuri, HTML Entity Encoder / Decoder for encode and decode html entities like & < > instantly in your browser, Number Base Converter for convert numbers between binary, octal, decimal, and hexadecimal bases instantly, JSON to CSV Converter for convert json arrays to csv format with table preview and instant file download, CSV to JSON Converter for convert csv data to json format with auto-detection of delimiters and table preview. Each tool is designed to save you time and deliver professional results right from your browser.
When to Use Each Tool
Common Workflows
These data & encoding tools work well together. Start with Base64 Encoder / Decoder to encode text to base64 or decode base64 strings instantly in your browser, then use URL Encoder / Decoder to encode and decode urls and query parameters with support for encodeuricomponent and encodeuri. Combine with HTML Entity Encoder / Decoder to round out your workflow and cover all your data & encoding needs.
Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 strings instantly in your browser.
URL Encoder / Decoder
Encode and decode URLs and query parameters with support for encodeURIComponent and encodeURI.
HTML Entity Encoder / Decoder
Encode and decode HTML entities like & < > instantly in your browser.
Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal bases instantly.
JSON to CSV Converter
Convert JSON arrays to CSV format with table preview and instant file download.
CSV to JSON Converter
Convert CSV data to JSON format with auto-detection of delimiters and table preview.
Frequently Asked Questions
Is my data secure when encoding or decoding?
Yes, all encoding and decoding operations happen entirely in your browser. No data is sent to any server, making these tools safe for API tokens, passwords, and any sensitive information you need to encode or decode.
Can I convert between multiple formats at once?
Each converter handles a specific format pair (e.g., JSON-to-YAML or CSV-to-JSON) for reliability and clarity. You can chain converters by copying the output of one tool into another for multi-step conversions.
Do the tools handle large files?
Since all processing happens in your browser, performance depends on your device. Most tools handle inputs up to several megabytes without issues. For very large files, processing may take a moment but your data still never leaves your machine.
Related Resources
Explore more tools in the Developer section, or browse all categories below.