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Fix Single Quotes in JSON — Convert to Valid Double Quotes

JSON requires double quotes — single quotes are valid JavaScript but invalid JSON. This is the most common error when copying object literals from code. Paste your JSON below and JSONBlitz converts all single-quoted keys and values to correctly escaped double quotes automatically.

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Fix Single Quotes in JSON — Convert to Valid Double Quotes Online Free

JSON requires double quotes for all strings. Single quotes are valid in JavaScript but not in JSON, so copying object literals from your code directly into a JSON context always fails. JSONBlitz converts single-quoted keys and values to double quotes automatically, handling escaped characters correctly.

Why Single Quotes Break JSON

The JSON specification (RFC 8259) mandates double quotes for string literals. Single quotes are legal JavaScript but illegal JSON. When a JavaScript developer copies an object literal to use as JSON data, the parser immediately throws an "unexpected token" error pointing at the first apostrophe.

How JSONBlitz Fixes Single Quote Errors

Paste your single-quoted JSON and JSONBlitz converts every single-quoted key and value to a properly escaped double-quoted equivalent. Apostrophes inside values are preserved correctly. The Diff tab shows exactly which characters were changed.

Frequently Asked Questions

Can I use single quotes in JSON?
No. The JSON standard requires double quotes for all string literals. Single quotes are only valid in JavaScript, not JSON.
Will JSONBlitz break strings that contain apostrophes?
No. Apostrophes inside values are preserved and correctly escaped in the output.
What other JSON errors does JSONBlitz fix?
Trailing commas, unquoted keys, JavaScript comments, truncated JSON, and more — all in one paste.

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