Online JSON Formatter & Base64 Converter
Free online tool to format, validate, and minify JSON, convert JSON and text to Base64 and back. UTF-8 support, file uploads, and downloadable results.
JSON & Base64 Studio — Online JSON Converter
Workspace
.json and .txt files up to 2 MB. Your content stays in your browser.
How to use JSON & Base64 Studio
- Choose a mode. Select JSON formatting, validation, minification, or JSON/Base64 and plain-text conversion.
- Add your input. Paste content into the editor or upload a local JSON/TXT file up to 2 MB.
- Process and export. Click “Process”, then copy the output or download the result as a file.
JSON formatting and Base64 conversion
JSON Formatter makes nested objects and arrays easier to read. JSON Validator checks the structure against JSON syntax rules, while Minifier removes unnecessary whitespace. Base64 is an encoding, not encryption: it does not protect sensitive information. Every conversion runs locally in your browser.
JSON mode requires strict JSON syntax: double-quoted strings and keys, no comments, and no trailing commas.
Privacy
Conversions run directly in your browser using built-in JavaScript APIs. This tool does not send your input to CrazyFB servers or third-party APIs. Avoid entering sensitive data on shared devices.
Frequently asked questions
Can it convert non-ASCII text to Base64?
Yes. UTF-8 processing supports international languages, Cyrillic, and emoji.
What is the difference between JSON Validator and Formatter?
Validator checks syntax. Formatter checks syntax and produces a nicely indented result.
Is Base64 a type of encryption?
No. Base64 does not protect data. Anyone who receives a Base64 string can decode it.
Is there a file size limit?
Yes. This version limits files and input to 2 MB to reduce the chance of browser slowdowns.
Does CrazyFB store my data?
No. Everything runs in your browser without sending the content to a server.