Nested API response
{"user":{"id":7,"name":"Ada"},"ok":true}Run Format JSON to inspect the user object on separate indented lines.
DEVELOPER TOOLS
Developer tools for JSON and text data
Prepare text data for development with a JSON formatter and validator, plus a Base64 encoder and decoder. Explore examples and browser-based tools.
TRY IT RIGHT HERE
A starting point you can work with
Choose a tool or load an example below. Switching tools or loading an example replaces the current input and result.
Make your JSON readableProcessed in your browser
SMALL, WORKED STARTING POINTS
Six examples to try and adapt
Load an example into the workspace above, then edit it or try another variation.
Two records for a test
[{"id":1,"tag":"alpha"},{"id":2,"tag":"beta"}]The result keeps two records in the same array order.
Configuration with an exact ID
{"accountId":"9007199254740993","enabled":false,"limit":null}The ID is deliberately a string. Formatting does not validate your application schema.
Find a trailing comma
{"enabled":true,}Intentionally invalid: Format JSON displays an error. Remove the comma after true and try again.
Encode multilingual text
Hello 世界
Expected result: SGVsbG8g5LiW55WM
Decode a greeting
SGVsbG8=
Expected result: Hello
Tools in this collection
Free to use, no sign-upJSON formatter
Make tangled JSON readable. Format, validate, and copy.
DeveloperFree · No sign-up
Base64 converter
Encode or decode text, right here in your browser.
ConverterFree · No sign-up
Choose a tool for your task
Read and validate a JSON document
Format compact API responses and check configuration syntax. The JSON formatter adds readable indentation, but does not validate an application schema.
Use the json formatterConvert text to or from Base64
Encode UTF-8 test strings or inspect encoded text values. Base64 changes representation; it does not encrypt your data.
Use the base64 converterPut it to work
Debugging a compact API response
Load the API example, format it and inspect the nested user object. Substitute a small synthetic response when reproducing a bug; formatting checks syntax, not API correctness.
Reviewing a configuration change
Try the configuration example and then the trailing-comma example. Compare successful formatting with the syntax error before reviewing application-specific fields elsewhere.
Testing an international text payload
Encode Hello 世界, copy the result, switch to Decode Base64 and paste it back. The round trip should recover the original UTF-8 text.
Keeping an identifier exact
The configuration fixture stores a long ID in quotes. Keep precision-sensitive identifiers as strings and preserve the original document when investigating data loss.
What this collection can and cannot do
- JSON formatting checks syntax only: no JSON Schema, JSON5, comments, CSV or XML conversion. Duplicate keys can be lost and large numeric values can lose precision.
- Base64 supports standard Base64 containing UTF-8 text, not binary images, files, JWT inspection or Base64URL. Encoding is not encryption.
- Inputs are processed in the browser. No upload or batch-file workflow is provided; very large pasted documents may make your tab slow.
Frequently asked questions
Does this collection include file converters?
The current tools accept text pasted into the browser. Binary file conversion, CSV conversion, and uploads are not available in this collection.
Which JSON formats are supported?
The formatter accepts standard JSON. Comments, JSON5, and trailing commas are not supported. Keep precision-sensitive numbers as strings.
Where is the input processed?
JSON parsing and Base64 conversion take place in your browser. The tools do not upload your input to a processing server.
Can I repair invalid JSON automatically?
No. The parser reports a syntax error. Edit the input yourself and retry; the trailing-comma example provides a small practice case.
Can I convert JSON to CSV or XML here?
No. This collection formats standard JSON and converts UTF-8 text to or from Base64. It does not convert between structured data formats.
Can I decode a JWT or a Base64 image?
No. JWT segments typically use Base64URL, and image payloads contain binary bytes. This tool is designed for standard Base64 text fixtures.