How does the validator indicate syntax errors?

When invalid JSON is detected, the tool pinpoints the exact line number and character column where parsing failed.

JSON Formatter & Validator

Format JSON payloads with 2-space, 4-space, or tab indentation. Includes minification and syntax validation with line and column error indicators.

Formatting & Compression Controls

Status: Valid JSON

01.Paste your raw JSON string into the editor.

02.Select an indentation mode (2 spaces, 4 spaces, or tabs) or click Minify.

03.Review syntax validation errors with exact line and column numbers.

04.Copy or download the formatted JSON file.

No. All formatting, minification, and parsing execute locally inside your browser memory.

Encode and decode Base64 strings and UTF-8 text.

Encode and decode query strings and URL components.

Decode JSON Web Token headers, payloads, and timestamps.

Test regular expressions with match groupings and flags.