Rich Text Change Viewer
Compare two Quill Delta documents. Find changed words and formatting, then download the steps that turn one draft into the other.
What is the difference between a document Delta and a change Delta?
A document Delta contains inserted content and its formatting. A change Delta describes inserts, deletions, and retained text with optional formatting changes. This tool compares two documents and exports the operations that transform the first into the second.
Original document
On your deviceChanges & documents
A clear view of your words.
Run the tool to preview the document and prepare your export.
Three simple steps
How to use Rich Text Change Viewer
Paste the original and revised document Delta JSON.
Compare their previews and the exact change operations.
Download the change Delta or either source document.
Common questions
Good to know
Understand the result.
Keep the original.
Is this tool free, and are my files uploaded?
This tool is free with no account required. The work happens in your browser. Your input and files are not sent to a processing server.
What are the limits and details?
This supports text, headings, lists, blockquotes, code, links, alignment, and basic inline formatting. Embedded objects and unknown attributes are rejected explicitly to prevent silent loss.
Limits: 20,000 characters and 2,000 operations in each document. Diff processing stops after 30 seconds.