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Why These Features Matter

Browser-only processing — why privacy matters for a diff tool

A diff tool is often used with sensitive content: source code, legal contracts, personal documents, or confidential business data. If the tool sends that text to a server to process it, your data is exposed to a third party's infrastructure, logging, and data retention practices. TextCompare runs the entire diff algorithm in your browser — no text is ever transmitted to our servers. This is verifiable: open your browser's DevTools Network tab while using TextCompare and you will see zero outbound requests carrying your text content.

Word and character diff modes — when line diff is not enough

Line-level diff is suitable for code and structured documents where each line is a meaningful unit. For prose — articles, contracts, emails — the meaningful unit is the word. A single changed word in a 200-word paragraph triggers a "modified line" in line-mode diff, but the reader still has to find the change manually. Word-mode diff highlights the exact word that changed, saving time and reducing the chance of missing a change. Character-mode diff is useful for structured identifiers, phone numbers, or any string where a single character matters.

JSON-aware diff — eliminating false positives

JSON files are often reformatted by tools: indentation levels change, key order changes, trailing whitespace is added or removed. A plain line-level diff of two semantically identical JSON files — one indented with 2 spaces and one with 4 — would show hundreds of false-positive changes. TextCompare's JSON Diff Checker parses both inputs as JSON, normalizes them to a canonical form (sorted keys, consistent indentation), then diffs the normalized output. Only genuine value changes appear in the result.

Share URLs — collaboration without file attachments

Collaborating on a diff typically means emailing text files, pasting snippets into a chat tool, or manually describing what changed. A share URL lets you send a colleague a link that opens TextCompare with both texts pre-loaded, showing them exactly the diff you were looking at. Because the texts are embedded in the URL (gzip-compressed and Base64-encoded), no server storage is involved and the link works indefinitely.

Unified view — the standard format for code review

The unified diff format is the output of git diff and the format expected by most code review tools, issue trackers, and patch submission systems. If you are generating a diff to include in a pull request description, a GitHub issue, or a Stack Overflow answer, the unified view produces output in the expected format. text-compare.com does not offer a unified view; TextCompare does.

Dark mode — usability and eye strain

Diff tools are often used for extended review sessions. A dark-mode interface reduces eye strain significantly in low-light environments. TextCompare auto-detects your OS dark/light preference and applies the appropriate theme, with no toggle required. The color scheme is designed specifically for diff content — green and red highlights that remain readable on both dark and light backgrounds.