SheetScout: edit AutoCAD Sheet Set (.dst) files without AutoCAD

Every AutoCAD and Civil 3D project ships with a Sheet Set: the .dst file that Sheet Set Manager uses to organize sheets, subsets, drawing links and custom properties. It is quietly one of the most edited files on a project — sheet numbers shift, titles get corrected, paths move when a job is re-filed — and yet the only ways to touch it are to open Sheet Set Manager inside AutoCAD, one field at a time, or to buy a third-party desktop utility.

That never sat right with me. The .dst is just structured data. Editing a sheet number should not require launching a multi-gigabyte application, and correcting fifty drawing paths after a folder move should not be fifty manual clicks.

SheetScout is my answer: a single-page tool that opens a .dst directly in your browser, shows the whole set as a tree, and lets you edit it — then writes it back in the exact same format Sheet Set Manager expects.

What it does

• Full tree view — sheet set, subsets and sheets, the way SSM shows them.
• Edit any field — sheet number, title, description, include-for-publish, drawing paths, and both sheet- and set-level custom properties.
• Reorganize — reorder sheets, move them between subsets, add new sheets and subsets, detach drawings.
• Scoped find & replace — swap text across sheet numbers, titles, descriptions, properties or drawing paths, with a "whole value only" mode so replacing 9 doesn't also rewrite 99 or a date.
• Batch edit — select many sheets at once; fields that match show their value, fields that differ show various. Set one value and it applies to all of them.
• Undo — up to five steps back, plus a guard so you can't accidentally close the tab with unsaved changes.
• Saves under the same filename — so AutoCAD keeps its link to your drawings.

Your file is processed, never stored

There is no account and no database. When you open a .dst, it is sent to SheetScout's own endpoint, edited, and handed straight back to you — nothing is kept, logged to a file, or shared. The file leaves your browser only to be processed, and only for that moment.

A note on how it works

The .dst format isn't publicly documented, so getting here meant working out how Autodesk stores a sheet set on disk and confirming, across many real project files, that SheetScout reads and rewrites them losslessly — an untouched file saved back out is byte-for-byte identical. It's tested against production sets from live Civil 3D projects. As always with a tool that edits project files, keep a backup of anything important; SheetScout can make one for you on save.

If you use it and something looks off, or your workflow needs an edit it doesn't cover yet, tell me — I'd like to make it genuinely useful for the people doing this work every day.