DiffFind

DiffFind is a web app for comparing two versions of text, documents, PDFs, spreadsheets, structured data and API requests. It combines a deterministic, repeatable diff with optional AI-based semantic analysis that explains whether the meaning of a change differs. It also offers a REST API and a Chrome launcher extension.

What It Is

DiffFind is a document and text comparison tool. You paste text, choose a file, or load content from a URL or cURL command, then compare by character, word, sentence, line or paragraph. Additions, removals and moved text are shown with surrounding context. Supported formats include plain text, JSON, YAML, XML, CSV, PDF, Excel (XLS/XLSX) and Word (DOCX).

Exact and Semantic Comparison

The core comparison works without AI. Optional semantic analysis highlights material changes and explains their likely impact, and the site states that cited facts are checked against the source documents with verification status shown. For structured formats, JSON, YAML, XML and CSV are compared by structure, PDFs show highlighted changes on the page, and Excel files are compared across every sheet.

Semantic Find

Semantic Find searches documents by meaning rather than exact keywords, so a query such as "how much is the rent" can locate a passage worded as "monthly lease payment". The same search can be run across two document versions to see how the answer changed, and keyword matching remains available.

API and Developer Workflow

Developers can call a REST API (POST /v1/compare with before and after content) described in an OpenAPI specification. API requests and responses can be compared from files, URLs or cURL commands, and agent-ready functions are offered for AI agents. Desktop and self-hosted versions are listed as coming soon.