Document Delta

Input—per 1M tokens

Output—per 1M tokens

Context—tokens

WeightsClosed

About

Document Delta is ranked #2 of 25 in document comparison software on Inferse. It runs on API, Web. There is a free plan.

Compared on document comparison software

Free plan: Yesdocumentdelta.com
PDF comparison: Nodocumentdelta.com
Office file comparison: Yesdocumentdelta.com
Formatting changes: Yesdocumentdelta.com
Redline output: Yesdocumentdelta.com
Deployment: webdocumentdelta.com

Facts

Purpose: Document Delta compares two DOCX files and returns one document with differences highlighted using Word's native tracked changes.documentdelta.com · 1 Oct 2026
Workflow: The service uses three steps—upload, compare, and download—and requires no signup.documentdelta.com · 1 Oct 2026
Comparison scope: Its engine analyzes paragraphs, tables, headers, footers, text boxes, content controls, and characters.documentdelta.com · 1 Oct 2026
Precision: It detects changes at the run and character level, including insertions, deletions, and formatting changes.documentdelta.com · 1 Oct 2026
Word revisions: Output uses Word's built-in tracked-changes markup, which can be accepted, rejected, or commented on in Microsoft Word.documentdelta.com · 1 Oct 2026
Formatting: The tool tracks bold, italic, underline, font, and style changes even when text is identical.documentdelta.com · 1 Oct 2026
Structured content: It compares content controls, text boxes, images, comments, hyperlinks, footnotes, endnotes, and tables.documentdelta.com · 1 Oct 2026
Performance: The comparison engine is optimized for large documents and says lengthy contracts and legal agreements are compared in seconds.documentdelta.com · 1 Oct 2026
Privacy: Files are processed entirely in memory, never saved, stored, or shared, and are discarded when comparison completes.documentdelta.com · 1 Oct 2026
API: The REST API compares two Word documents with a single HTTP request and requires no SDK or API key.documentdelta.com · 1 Oct 2026
API languages: The site provides examples for C#/.NET, Python, JavaScript, PowerShell, and Java, and says the API works from any language.documentdelta.com · 1 Oct 2026
API file limit: Each original and modified DOCX file sent to the API has a maximum size of 500 KB.documentdelta.com · 1 Oct 2026
API rate limit: The public API allows 10 requests per hour per IP address.documentdelta.com · 1 Oct 2026
Beta status: The free comparison tool is in beta and actively improving, and the site invites users to report issues or unexpected results.documentdelta.com · 1 Oct 2026