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Developer ToolsString Escaper
Escape or unescape strings for JSON, HTML, and URL encoding with this free online tool. Works directly in your browser with no data sent to servers.
You can also drag and drop a text file here
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About String Escaping/Unescaping
What is String Escaping?
String escaping is the process of adding escape characters to special characters in a string so they can be properly interpreted in specific contexts like JSON, HTML, or URLs. This prevents parsing errors and security issues such as code injection.
Types of Escaping
- JSON: Escapes quotes, backslashes, and control characters
- HTML: Converts characters like <, >, & to HTML entities
- URL: Encodes special characters for use in URLs
Common Use Cases
- Preparing strings for inclusion in JSON data
- Making text safe for HTML output (preventing XSS attacks)
- Encoding parameters for URL query strings
- Working with APIs that require escaped inputs
- Debugging issues with improperly escaped strings
- Processing user input for storage or transmission
Frequently Asked Questions
What is string escaping and why is it important?
String escaping converts special characters into escape sequences so they can be safely included in JSON, HTML, URLs, or other formats. This prevents syntax errors and security vulnerabilities like XSS attacks.
What's the difference between JSON, HTML, and URL escaping?
JSON escaping handles quotes, backslashes, and control characters with backslash sequences (\\\" , \\n). HTML escaping converts < > & " ' to entities (<, >, etc.). URL escaping converts special characters to percent-encoded format (%20 for space).
When should I use each type of escaping?
Use JSON escaping when inserting text into JSON strings. Use HTML escaping when displaying user content in HTML to prevent XSS attacks. Use URL escaping when including special characters in URL parameters or query strings.
How do I escape quotes in JSON strings?
In JSON, double quotes must be escaped with a backslash: " becomes \\". Single quotes don't need escaping in JSON. Use our JSON escape mode to automatically handle all required character escaping.
Can this tool handle Unicode characters?
Yes, the tool properly handles Unicode characters in all escaping modes. For JSON, it can optionally convert Unicode to \\uXXXX sequences. For HTML, it supports both named entities and numeric character references.
What characters typically need escaping?
Common characters that need escaping include: quotes (" '), backslashes (\\), angle brackets (< >), ampersands (&), newlines (\\n), tabs (\\t), and carriage returns (\\r). The specific characters depend on the target format.
Is it safe to unescape strings from untrusted sources?
Be cautious when unescaping strings from untrusted sources, especially HTML content. Always validate and sanitize the result before using it in your application. Our tool shows the unescaped result for inspection before use.
Can I escape entire files or large text blocks?
Yes, the tool can handle large text inputs efficiently. It processes everything in your browser, so there's no file size limit imposed by server restrictions. Very large inputs are processed quickly with optimized algorithms.
How do I copy the escaped results?
Click the Copy button next to the output to copy the escaped text to your clipboard. You can then paste it directly into your code, configuration files, or wherever you need the properly escaped text.
Does this tool work offline?
Once the page loads, all escaping and unescaping operations work completely offline in your browser. No data is sent to servers, ensuring your text remains private and the tool works even without an internet connection.
What should I do if my escaped text looks wrong?
Double-check that you've selected the correct escaping type (JSON, HTML, or URL) for your use case. Different formats have different escaping rules. You can also use the unescape function to verify that your escaped text converts back to the original correctly.
Can I batch process multiple strings?
The tool processes the entire input as one block. To escape multiple separate strings, you can paste them line by line and escape them together, then separate the results as needed. Each line will be escaped according to the selected format.