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We all have an Excel file that’s too large. The kind that takes minutes to open or save, so everything takes twice as long.
Florence, Senior Consultant at UpSlide, has a few easy hacks up her sleeve that will help you reduce your Excel file size within seconds.
Discover seven easy ways to compress Excel files in the article below.
Table of Contents
How to audit a large Excel fileBefore we show you how to reduce your Excel file size, we’d first like to share a quick tip on auditing an Excel workbook.
For finance professionals working in Transactional Services or Investment Banking, building models with tons of formulas, tables and sheets is the norm. However, the more comments, formulas, conditional formatting and hidden sheets you add, the heavier the Excel file gets.
You can easily discover which sheets are the heaviest in your Excel file. To do so, make a copy of your Excel file and follow these steps:
- Open the File Explorer where your Excel is saved
- Display file name extensions in the “View” tab
- Change your Excel file copy’s extension to “.zip”
- Then open the zipped folder and go to xl > worksheets
- Sort by size
Spotting the heaviest Excel sheets can help you choose which one to start with. For instance, “sheet26.xml” accounts for almost one-third of the global volume. Usually, it corresponds to the n+1 sheet in your Excel file. So, in the above example, we could start by trimming the twenty-seventh sheet.
Be careful! The n+1 rule takes into account hidden sheets. If you have a lot of hidden sheets, it can become tricky to find the right one. One way to know for certain you have the right sheet is to get the exact name. Here is the detailed guide for finding a sheet’s name.
Now, it’s time to dive into our seven tips for reducing an Excel file size:
Tip #1: Remove conditional formattingConditional formatting comes in handy when you need to highlight specific data. But it can quickly make your Excel file heavy. We suggest removing conditional formatting from your spreadsheet as soon as you are done with it. To do so, you must:
- Select some formatted cells on your sheet
- Go to the Home tab > Conditional formatting > Clear Rules > Clear from Selected Cells
If you want to remove conditional formatting from all of your cells, pick Clear Rules from Entire Sheet.
Tip #2: Crop each worksheet to its used rangeDid you know that Excel sheets can have up to one million rows? A good way to reduce your Excel file size is to get rid of the empty rows and columns. Here’s how to do that:
- Select all unused rows and columns (Shortcut = Ctrl+Shift+Right/Down Arrow)
- Right-click > Delete
We all use Excel formulas to manipulate and combine data dynamically. But we often forget to remove them when they’re no longer needed.
Be sure to replace your formulas with their values to downsize your file and keep a record of your data. Here’s a quick way to do it:
- Select the cells you are working with (you can use the shortcut Ctrl+A to select your entire sheet)
- Copy and Paste Special: Values
This will also remove hyperlinks, which make your file heavy.
Discover 16 basic Excel tips
Tip #4: Compress pictures in ExcelThe golden rule is to avoid having pictures in Excel. If you have to use pictures, it’s best practice to always compress them. Here’s how:
- Select the picture you wish to lighten
- Go to the Picture Format tab
- Click on Compress
- We recommend unchecking the first box Apply only on this picture to compress all pictures inside your Excel file
- Optional: you can choose the resolution you want (we recommend email).
Formatting enables the eye to naturally structure information. However, formatting your data also weighs your sheets down. If you’re running into difficulties loading a file, we recommend removing your formatting. Follow these few easy steps:
- Select all formatted rows, columns and cells that do not contain data
- Home > Editing > Clear Format
Want to learn the Top 6 Excel financial functions?
Tip #6: Delete watchesPeople who work on large files with many sheets and formulas know what watches are (not the one on your wrist!) Numerous watches will weigh down your spreadsheets. Once you’re done with them, a good practice is to remove them from your files:
- Go to Formula tab > Watch Window
- Select all and click Delete
IMPORTANT: We recommend you apply this step last, as it can break formulas and cannot be reversed! Make a copy beforehand.
Let’s start with sheets!
- Right-click on a sheet
- Select Unhide
- Repeat the previous steps for every sheet
Now let’s do the same with columns and rows:
- Select your entire sheet (Ctrl+A)
- Right-click on your rows/columns
- Click Unhide
Now that you can see your entire Excel file, you can delete all unnecessary sheets, columns and rows. Moreover, you can easily audit your Excel file to spot heavy sheets with the method we used at the beginning of the article.
✨BONUS TIP: Reduce your Excel file size in one clickAt UpSlide, we like to work on light files. That is why we created a feature that does the work for you: Smart Clean! It applies all the above tips in the blink of an eye. A single click on the UpSlide tab in Excel and your file will be as light as a feather.
This feature can reduce your Excel file size up to 99% of its initial weight!
- Try the Smart Clean now
Want to find out more about UpSlide’s features and how we help you save time on Microsoft Office?
- Discover our features
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OneAbdelah
2 years ago
This is definitely a very useful post, thank you for sharing
8
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Pablo
2 years ago
The delete empty rows trick… OMG, that is a game changer for me. I didn’t know that when you copied full page ranges a million rows got copied! That was why my files were in the tens of megs. Now they’re 200kb! Thank you.
37
Reply
Will
2 years ago
can’t make sense of these instructions at all step 1: Change file extension to .zip?? Do you mean save as a zip – not possible, or send to a zip folder: tried that but it’s still and excel file?? so step 2 open zip file and go to XL>worksheets ?? no such menu options
0
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Author
Edouard Ouaknine
2 years ago
Reply to
Dear Will,
Thanks for spotting this!
We added two extra steps so you can see how to effectively change your file extension to ZIP.
Hope this will help you to reduce the size of your future heavy Excel spreadsheets 🙂
Best,
Edouard
4
Reply
Bart
2 years ago
You can use Ctrl-End to find the outmost cell that is being saved. It will show if there are indeed empty column/rows that are actually being saved/causing the large file size.
0
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Author
Edouard Ouaknine
2 years ago
Reply to
Hi Bart,
Thanks for the tip!
Another way to highlight cells containing data is to select “A1” and use Ctrl+Shift+End (this shortcut extends the selection to the last used cell on the worksheet).
1
Reply
Jignesh
2 years ago
Hi, Thanks for sharing. This is very useful.
0
Reply
Tom
2 years ago
This was the first page I found for this problem – but I could not crop the unused rows until I reset the row height to the default for that spreadsheet (see //superuser.com/questions/1349521/deleting-rows-in-excel-doesnt-reset-last-cell-used-range)
0
Reply
Jaz
2 years ago
Save my life!
0
Reply
Jason
2 years ago
I had 3 separate sheets in my file that had blank columns in the “used range” all the way to XFD (16,000+ columns). I deleted all 3 and the used range is now down to about 50 columns, then saved the file. This resulted in no reduction (zero k) in file size. I verified that the used range is now correct and this bloated columns are gone, so why no change in size?
16
Reply
izabely lima
2 years ago
Save as Excel Binary Workbook.
5
Reply
VANDEEP
2 years ago
Reply to
THANKS IT WORKED.
0
Reply
Afaq Zaheer
1 year ago
Thanks Alot… Useful post
0
Reply
Tom
1 year ago
Fantastic Post, thank you very much. The ZIP file method is incredible, I will not forget that going forward. We went from 46MB to 874KB.
3
Reply
Jack Rick
1 year ago
I tried 1st method but xecel file size increased 12MB to 124MB and system fully slow. But then I follow all series wise finally reduce excel file size. thanks
2
Reply
vim
3 months ago
Tip #2 knocked 8 meg off. Thanks Fella.
0
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William Kus
27 days ago
The only problem with the delete function is that some computers may crash because of how much memory it takes to do this. I feel like Excel should automatically limit the cells. Not sure why 99% of users would need that many.
0
Reply
William Kus
27 days ago
Also when I was using the delete function to crop down a page with about 40000 rows, and a few hundred columns, I had to do a portion at a time (and mind you I have a gaming rig). Inbetween, I had to save, closeout of the program, and reload the excel sheet, reselect new portions, and delete again. The delete function stopped working if I didn’t save and closeout, and re-open. Not sure if anybody else is having this issue.