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Change the letter case of the cells you selected — UPPERCASE, lowercase, Title Case, Sentence case. Fast on thousands of cells. Numbers, dates and formulas are never touched.
デベロッパー:
リスト更新日:2026年10月21日
対応デバイス:
2万+
概要
Google Sheets™ has UPPER(), LOWER() and PROPER(), but they build a second column you then have to copy back
over the first. Change Case rewrites the cells you already have, in place, in one step.

WHERE TO FIND IT AFTER INSTALLING
Change Case opens in the SIDE PANEL on the right of your spreadsheet, not in the Extensions
menu. Look for its icon in the narrow strip down the right edge; if that strip is hidden, click
the small arrow at the bottom-right corner to show it.

FREE, AND STAYING FREE

• UPPERCASE, lowercase, Title Case and Sentence case, on exactly the cells you selected.
• Fast. It reads your whole selection in one operation and writes it back in one operation, so thousands of
  cells take about a second rather than several minutes.
• Numbers, dates and formulas are never touched. Only cells that contain text are changed, and the panel
  tells you how many cells it left alone.
• See a sample of the result before you apply it.
• Undo the last change with one click.
• Accented capitals come out right: ș becomes Ș, é becomes É, ü becomes Ü.

All of that is free, permanently — including the speed. Speed is how the tool is built, not an upgrade.

PRO — $29 per year, or $69 once

FOR TEAMS AND ORGANISATIONS
If an administrator installed this for your whole domain, a per-person licence is the wrong shape.
A team licence covers everyone in the domain, for every tool we publish: $149 a year up to 50
people, $349 a year unlimited within one domain. It is invoiced, with your company details and VAT
number. Write to gheorghe.beschea@overheat.agency
Details: https://legal.syncerp.work/team

• Editorial Title Case, where small words stay small: "The Lord of the Rings", not "The Lord Of The Rings".
• tOGGLE cASE, for when caps lock was on.
• camelCase, PascalCase, snake_case and kebab-case, for column headers and identifiers.
• Tidy up stray spaces — trim the ends and collapse doubles.
• One licence per add-on. The key you buy here unlocks Pro in Change Case, on up to three Google
  accounts. A team licence covers every add-on we publish, for a whole organisation.

BUILT TO BE FAST

The add-on this replaces was well liked and then abandoned, and long before it broke, its reviews were
already about one thing. In four languages, over nine years, people wrote that it was too slow — one of
them said plainly that writing his own script was less trouble. That happens when a tool asks Google for
every cell separately.

This one asks once. Your selection is read in a single operation, transformed in memory, and written back
in a single operation. On a few thousand cells the difference is minutes versus about a second.

ONE PERMISSION, AND NOTHING LEAVES GOOGLE

Change Case asks for exactly one permission: access to the spreadsheet you currently have open. Not your
other spreadsheets. Not your Google Drive™. Nothing in Gmail™, Google Calendar™ or your contacts.

It runs entirely inside Google Apps Script™. There is no database, no analytics and no tracking. Without a licence key the add-on makes no network request at all; with a Pro licence it asks our licence server once a day whether that key is still active, sending only the key and a random installation id. Nothing is transmitted to us, because there is nowhere for it to be transmitted to.

HOW TO USE IT

1. Install, then open any Google Sheet.
2. Select the cells you want to change.
3. Open Change Case from the side panel on the right.
4. Pick a case, check the preview, press Change. Changed your mind? Press Undo.

Questions, bugs and feature requests: gheorghe.beschea@overheat.agency — a person answers.
詳細情報
料金無料(有料機能あり)
デベロッパー
サポート
プライバシー ポリシー
利用規約
Change Case — UPPERCASE, lowercase, Title Case は以下の権限をリクエストします。詳細
Change Case — UPPERCASE, lowercase, Title Case は、ご使用の Google アカウントにアクセスする必要があります
この操作を行うと、Change Case — UPPERCASE, lowercase, Title Case に次の権限が付与されます。
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