How to Remove Non-Printable Characters in Excel

Non-printable characters are control codes - things like line feeds, carriage returns, and tab characters embedded inside a cell - that do not display as visible symbols but still count as part of the cell's text content. They frequently enter a spreadsheet through database exports, text pulled from PDFs, or data copied from software that inserts formatting or control codes that were never meant to be seen by a person.

Because these characters are invisible, they are one of the most confusing problems to diagnose - a cell can look completely normal while still failing an exact-match comparison or producing an unexpected extra line inside what should be a single-line cell.

Excel's CLEAN function removes the first 32 non-printable ASCII control characters from text, which covers most common cases like line feeds and tabs. However, some imported data contains non-printable characters outside that basic ASCII range, particularly from files exported with certain encodings, and CLEAN will not touch those. A more thorough manual approach sometimes combines CLEAN with SUBSTITUTE calls targeting specific problem characters identified using the CODE function.

As with TRIM, CLEAN requires a helper column and a paste-as-values step to actually replace the original cell content.

A common mistake is assuming the CLEAN function alone catches every possible non-printable character, when some imported files carry control characters outside the basic ASCII range that CLEAN does not remove. Another pitfall is applying CLEAN without also trimming ordinary spaces, since CLEAN and TRIM solve related but distinct problems - one targets control codes, the other targets space characters - and a fully clean cell usually needs both fixes applied together.

1. Insert a helper column next to the text you want to clean.
2. Enter =CLEAN(A1) in the first cell of the helper column.
3. Fill the formula down across your data range.
4. Copy the helper column and use Paste Special > Values to replace the original text.
5. Delete the helper column once the cleanup is confirmed.

Turbo Excel Cleaner's Remove Non-Printable Characters feature applies a broader cleanup than the basic CLEAN function alone, stripping control codes and other invisible characters directly from every text cell across every sheet you load, without a helper column or manual paste step. This is particularly useful for data pulled from legacy database systems or PDF exports, which often carry a wider range of hidden characters than a typical office document.

Running this alongside the whitespace-trimming features gives you text that is fully normalized for exact matching, sorting, and export into other systems.

• Removes invisible control characters from every text cell
• Covers a broader character range than the basic CLEAN function
• No helper columns or manual paste steps required
• Pairs well with whitespace trimming for fully normalized text
• Works on Excel, OpenDocument, CSV, TSV, and TXT files