Add the original text
Paste the baseline into the left field. Keep line endings and surrounding context consistent so changes are meaningful.
Online text diff for line-by-line comparison
Compare an original and changed block line by line without sending either version to the server. Use the result for a quick inspection, not as a replacement for version-control history.
Compare two text blocks
Use the left side for the original and the right side for the changed version.
How to use the text comparison tool
The text comparison tool keeps its input on this device. Review the result using the steps below before sharing or relying on it.
Add the changed text
Paste the candidate revision on the right, then compare to mark removed and added lines.
Interpret the result
A minus marks a line from the original and a plus marks its replacement or addition. Review nearby unchanged lines before deciding what changed semantically.
What the text comparison tool does not do
The comparison is deliberately simple and line-based. It does not calculate a merge base, detect moved blocks, preserve authorship, resolve conflicts, or understand a programming language's syntax.
Before sharing the result, read Diff pastebin guide for the matching context and privacy checks.
Text comparison tool questions
Privacy, limits, and correct interpretation.
Are the compared texts uploaded?+
No. Both inputs and the generated comparison stay in the browser.
Is this the same as a Git diff?+
No. Git understands repository versions and context; this tool provides a quick two-block line comparison.
Can I compare code and configuration?+
Yes, but inspect semantic changes with the relevant compiler, parser, test suite, or schema afterward.
Related browser tools
After using the text comparison tool, choose another tool only if the next task changes to formatting, comparison, encoding, or measurement.
Format and validate JSON in your browser
Pretty-print compact JSON, minify a valid document, or locate a syntax error without uploading the input. The formatter runs entirely in this browser.
Open tool →Encode and decode Base64 text locally
Convert UTF-8 text to Base64 or decode a Base64 value locally. Base64 is a transport representation, not a confidentiality or access-control mechanism.
Open tool →Secret scanner for finding and redacting credentials
Check code, logs, configuration, and HTTP transcripts for common credential shapes before sharing. Detection and redaction run in this browser, and no input is uploaded.
Open tool →Online word, character, line and byte counter
Measure visible writing and actual UTF-8 storage size as you type. Counts update locally and help you check a text block before creating a paste.
Open tool →Online URL encoder and decoder
Percent-encode a URL component or decode an encoded value without uploading it. Use this tool for query values, paths, callback parameters, and sanitized HTTP examples.
Open tool →Free local JWT decoder for headers and claims
Inspect the Base64URL-encoded header and payload of a three-part JSON Web Token in this browser. The decoder never verifies the signature and never proves that a token is authentic or safe to trust.
Open tool →Unix timestamp converter for logs and APIs
Convert Unix seconds, Unix milliseconds, or an ISO 8601 date into UTC, local time, seconds, and milliseconds. Processing stays in the browser for safer log analysis.
Open tool →Generate a SHA-256 hash of any text
Create a lowercase SHA-256 digest from the exact UTF-8 bytes of a text block. Hashing runs through the browser Web Crypto API and does not upload the input.
Open tool →Local text cleaner for lines and whitespace
Prepare a text list or copied diagnostic block locally by trimming trailing spaces, compacting blank lines, removing duplicate lines, or sorting lines. Every action changes text, so review the result before replacing a source artifact.
Open tool →