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CrateX.app

Text Diff Viewer

Compare two pasted text blocks in your browser with line-level additions and deletions, side-by-side or unified views, sync scroll, and HTML export.

Original Text

Characters

0 / 50,000

Modified Text

Characters

0 / 50,000
Text Diff Viewer

Quick Start

1
Paste original text on the left.
2
Paste modified text on the right.
3
Run the comparison.
4
Review the summary and highlighted lines.
5
Use + and - markers for added and removed lines.

Common Scenarios

Code review

paste code snippets to verify the line-level scope before committing, then use the diff as context for review comments

Document proofreading

compare revisions to spot added/removed paragraphs and wording changes

Config changes

paste config file contents before and after edits to avoid accidental parameter removals

Log analysis

compare logs before and after an incident to pinpoint key differences

API responses

compare JSON/text responses across versions to confirm field and order changes

Merge conflicts

inspect both sides manually to understand what changed before resolving the conflict in your editor

Release notes

use the diff as raw material to summarize changes for changelogs

Translation updates

check how source text changes impact translations to avoid missing updates

Comparison Parameters & View

Use the gear menu to toggle “Sync scroll” (side‑by‑side only); unified view is unaffected

Comparison Boundaries

Line-level diff: small word or character edits are shown as a removed line plus an added line, not inline highlights
Context-limited result: long unchanged runs are trimmed to the lines near changes, so the panel and HTML export are not a full mirrored document
Pasted text only: paste file contents or code snippets into the two editors before comparing. Folder comparison and URL fetching are outside this page.
Code/config as text: there is no syntax highlighting, AST comparison, review comment, merge action, or Git patch output
Whitespace, case, and line endings are compared as entered; use Text Formatter first only when you intentionally want to normalize text before comparing
Export saves a static side-by-side HTML snapshot of the current result. Patch, TXT, PDF, image, and JSON exports are outside this page.

Usage Advice

“Swap” flips both sides so it’s easier to inspect older revisions
For large edits, compare in sections to keep the diff readable
Use Text Formatter first only when whitespace and line-ending differences are noise; normalization changes the text you compare
Long texts may take a few seconds; watch the progress hint and split the comparison if the browser slows down
“Clear” only clears the text and doesn’t affect settings; toggle “Sync scroll” from Settings (side‑by‑side)

Limitations & Compatibility

Line-based view: tiny character changes highlight the entire line
Whitespace counts—different indentation shows as changes
Different line endings (CRLF/LF) count as changes; normalize them first only when those differences are noise
Very long inputs take longer; if the browser slows down, split the diff
Mobile screens are cramped; desktop offers a fuller view

Privacy & Security

Text comparison runs locally in your browser. Original and modified text may stay as browser drafts, and line number, context, wrapping, sync-scroll, and view settings may be kept in browser storage. If a saved workspace or WebDAV sync is enabled, those texts and settings may be saved through that sync. Diff rows, summaries, context-clipped result panels, and exported HTML files are regenerated from the current texts and settings; this tool does not upload files or attachments.

FAQ

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All tool processing happens locally in your browser.