Free Diff Checker: Compare Two Texts Online

Two versions of a contract. Two copies of a config file. An essay before and after editing. Reading both line by line to spot the differences is slow and easy to get wrong. The PDFFlowState Diff Checker compares two texts and shows what changed, in your browser, for free, with no account.

Open the Diff Checker

What does Diff Checker do?

Diff Checker compares two texts and shows what changed. It works as a text compare tool, text diff tool and a way to find the difference between two texts.

How to compare two texts

1. Open the tool. Go to Diff Checker. It works on phone and desktop.
2. Paste the original text on one side.
3. Paste the changed text on the other.
4. Review the differences.

No sign-up is needed, so it is a free way to compare texts online.

When is it useful?

• Documents and contracts: spot edits between versions.
• Code and config files: see what changed before you deploy.
• JSON and CSV data: format with JSON Formatter first, then compare.
• Writing and editing: check what an editor altered.
• Copied content: see whether two pieces of text really match.

Tips

• Normalize the text first. Extra spaces and different capitalization show up as differences. Tidy both with Text Formatter or Case Converter.
• Comparing PDFs? Extract the text from each with Extract PDF Text, then compare the two.
• Compare one thing at a time to keep the result easy to read.

Frequently asked questions

Is the diff checker free? Yes. It is free and needs no sign-up.

Can I compare two files? Paste the text from each file into the two sides of the tool.

Can I compare two PDFs? Extract the text from both with Extract PDF Text, then paste it here.

Can I compare images? No. Diff Checker compares text.

Compare your texts now

Try the free Diff Checker or browse all the text tools on PDFFlowState.