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Clean Excel and CSV Files Before Work or Class (Browser, Free)

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Free Excel and CSV tools in the browser

Spreadsheets show up everywhere: shift schedules from work, grade exports, inventory lists, and group project data. The file is almost right, but duplicate rows, wrong commas, or a 50 MB export breaks your next step. You should not have to buy Excel add-ons or install unknown desktop software.

Tools N Go runs Excel and CSV helpers in your browser. No account, no subscription, and your file is processed locally when the tool supports it.

Common problems we hear from students and workers

  • “The CSV has thousands of duplicate emails.”
  • “I need to split a huge export into smaller files for email.”
  • “Two versions of the same sheet exist and I do not know what changed.”
  • “I forgot the formula for VLOOKUP again.”

Step 1: Remove duplicate rows

  1. Go to Excel duplicate remover.
  2. Upload your .xlsx or .csv file.
  3. Pick the column that should be unique (email, ID, or SKU).
  4. Download the cleaned file and keep the original as backup.

Step 2: Split a large CSV

Email and some school systems reject very large attachments.

  1. Open CSV splitter.
  2. Choose how many rows each smaller file should have.
  3. Download the zip of parts and upload them one at a time if needed.

Step 3: Compare two versions of a file

Perfect when a teammate edited the group project sheet without telling you.

  1. Use Excel file comparator.
  2. Upload the older file and the newer file.
  3. Review highlighted differences before you merge changes manually.

Step 4: Fix messy text and blanks

The spreadsheet data cleaner trims spaces, normalizes line breaks, and helps you spot empty rows before a presentation or boss meeting.

Step 5: When you only need a formula

Describe what you want in plain English on the Excel formula generator. Copy the formula into your sheet. Great for students learning SUMIFS, IF statements, or lookups.

Keep learning without paying

Tools N Go is built for people who work and study in the real world. We offer 25+ free tools today and are building 25+ more. Same rules: open the page, use the tool, leave when you are done.

Explore every spreadsheet helper on the Excel and CSV tools page, or read more guides on our blog.

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