ToolPad
Runs locally in your browser. Nothing you paste is sent to a server.

Text Compare

Compare two texts and highlight differences. Runs locally in your browser.

Local processing — nothing you paste is sent to a server.

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This text compare tool helps you compare two texts and highlight differences between them. Perfect for spotting changes in code, configuration files, logs, or any text content. The diff view shows insertions, deletions, and modifications side-by-side with color-coded highlights.

All processing happens locally in your browser — nothing you paste or upload is sent to a server. You can customize the comparison with options like ignoring whitespace, case sensitivity, trimming lines, and ignoring empty lines. For advanced users, inline differences show character-level changes within modified lines.

Common uses
  • Compare JSON responses or configuration files
  • Verify changes between document versions
  • Spot differences in copied or pasted text
  • Review code changes and file modifications

FAQ

Is Text Compare free to use?

Yes, Text Compare is completely free to use. There are no sign-ups, no accounts, and no usage limits. Simply open the tool and start comparing texts.

Is my text uploaded to a server?

No. All text comparison happens locally in your browser. Nothing you paste, type, or upload is sent to any server. Your data stays on your device for complete privacy.

Why does it say "No differences" when I can see changes?

The comparison options can affect results. If "Ignore whitespace" is enabled, spaces and tabs are ignored. "Ignore case" makes the comparison case-insensitive. "Trim lines" removes leading and trailing whitespace, and "Ignore empty lines" skips blank lines. Try disabling these options to see all differences.

Can I compare JSON or code?

Yes, Text Compare works with any text content, including JSON, code, configuration files, and logs. For better readability of JSON files, you can use the JSON Beautifier tool first to format them, then compare the formatted versions.

What does "Show inline differences" do?

When enabled, inline differences highlight character-level changes within modified lines. This is useful for seeing exactly which characters changed, but can be more resource-intensive on very large texts. It's disabled by default for better performance.

Is there a file size limit?

The tool is limited by your browser's available memory. Very large files (hundreds of megabytes) may cause performance issues. For best results, compare files under 10MB. If you need to compare larger files, consider splitting them into smaller sections.

Can I upload files?

Yes, you can upload text files using the Upload buttons in each editor panel. Supported formats include .txt, .json, and .csv files. The file content is loaded directly into your browser — nothing is uploaded to a server.

Why are some lines highlighted but empty on one side?

This indicates an insertion or deletion. Green highlighted lines on the right with an empty space on the left show text that was added. Red highlighted lines on the left with an empty space on the right show text that was removed. This is the standard way diff tools represent insertions and deletions.