Developer & Data Files
Format, validate, convert, encode and decode JSON, CSV, XML and Base64 data with practical browser-based developer utilities.
JSON Formatter & Validator
Format, validate, prettify and minify JSON online in your browser. Work with JSON locally with copy and download controls.
Base64 Encoder / Decoder
Encode or decode Base64 text and files locally. Supports UTF-8, standard Base64 and URL-safe Base64 with no upload required.
JSON to CSV
Convert JSON arrays and objects to CSV online in your browser. Preserve columns, escape values correctly and download the CSV locally.
CSV to JSON
Convert CSV or TSV data to JSON online for free. Handle quoted fields, multiline values, delimiter detection and optional type inference locally in your browser.
XML Formatter & Validator
Format, validate, prettify and minify XML online for free. Detect XML parser errors and work with your data locally in the browser.
Use the smallest data transformation that solves the problem
Formatting, validation, conversion and encoding are related tasks, but they do not mean the same thing.
A formatter makes structured data easier to read without intentionally changing its meaning. A validator checks whether the text follows the expected syntax. Conversion changes representation—for example, turning JSON records into CSV rows—so some structure may need to be flattened or simplified. Base64 encoding is different again: it represents binary or text data as characters for transport, but it is not encryption and should not be treated as a security feature.
JSON, CSV and XML have different shapes
JSON can naturally represent nested objects and arrays. CSV is a flat table, so nested data needs a clear mapping before conversion. XML can express hierarchy, attributes and namespaces that do not always have a one-to-one equivalent in JSON. When converting, inspect the output rather than assuming every source feature can be preserved automatically.
Protect secrets in sample data
Even when a utility processes data locally in the browser, avoid pasting production passwords, private keys, authentication tokens or unnecessary personal data into any troubleshooting workflow. Use representative test values when possible. Before downloading or copying transformed data, validate it with the receiving system's requirements, especially for delimiters, character encoding, date formats and required field names.