Bulk operations

Every operation on this page is recorded as a single reversible step in the change history.

Bulk field update

Select documents, or target an entire query result, and apply one change to all of them.

Operation	Effect
Set	Give the field the same value in every document
Delete	Remove the field entirely
Increment	Add to (or subtract from) a number, atomically
Array union	Add members not already present
Array remove	Remove members wherever they appear

These are issued as Firestore’s own server-side transforms, so they remain correct even if your application is writing to the same documents concurrently.

Bulk delete

Bulk delete takes a query rather than a selection, so it scales past what you can see on screen.

1. Write the query.
2. FireFetch runs a server-side COUNT(*) and reports the number of matching documents — “Found 1,842 documents matching this query.”
3. Confirm.
4. Deletion proceeds in batches of 500, with live progress and a working cancel button.

The collection is never loaded into memory, so this behaves identically on 200 documents and 200,000.

Read the count before confirming. If the number is not roughly what you expected, your query is not doing what you think it is — and you have just avoided a bad afternoon.

Find and replace

Open with Cmd/Ctrl+Shift+H.

Rules are typed. A rule matching the number 42 does not match the string "42", and a replacement does not change a value’s type unless you ask it to. Most find-and-replace implementations stringify everything, which is how numeric fields quietly become text.

Match modes:

• Exact — the whole value, including its type
• Contains — substring, within string fields
• Starts with — prefix, useful when migrating id schemes
• Regex — full patterns, with case sensitivity you control

Replacements are scoped to the filters currently applied in your tab, so you can narrow to exactly the documents you mean first. You always see a preview of every pending change before anything is committed.

Undo

All of it reverses. A bulk update across four thousand documents is one entry in the history panel and one click to take back — including find-and-replace, including partial string edits.