Yes, you can retrieve an Excel password — but only if it’s a *recovery* password used for opening the file, and only under very specific conditions. But if you’re hoping to crack a workbook protection password on Sheet1 or unprotect cells in B2:C10 without the original key, you’re up against cryptographic hashing — not a lockbox you can jimmy open.
Quick Answer
You cannot retrieve a forgotten Excel password in the traditional sense. What you *can* do is bypass or reset certain types of protections — but only for opening passwords (if weak) or remove sheet/workbook protection via low-level file manipulation. No method recovers the original password string; all effective approaches either exploit legacy encryption flaws or replace protection metadata entirely.
All the Methods
| Method | Time for 10K rows | Accuracy | Difficulty |
|---|---|---|---|
| ZIP + XML edit (workbook protection) | Under 90 seconds | 100% for unprotected sheets | Low |
| Brute-force with John the Ripper (open password) | Hours to days | Only works on RC4-encrypted files (.xls pre-2007) | High |
| VBA project password recovery (if enabled) | 2 minutes | Fails on modern VBA password encryption (SHA-2) | Medium |
| Hex editor removal (sheet protection) | ~4 minutes | Works on .xlsx/.xlsb if protection isn’t password-locked at binary level | Medium-High |
| Online tools (e.g., Passware, Elcomsoft) | Varies (minutes to hours) | Depends on license, encryption type, and hardware | Low (but risky) |
| Reset via Windows Credential Manager (rare) | 15 seconds | Only if saved as Windows credential (not common) | Very Low |
Method 1 Deep Dive
Let’s say Sarah Chen sent you Q3_Financials.xlsx — but locked Sheet1 so you can’t edit cells D5:F12. She forgot the password, and you need to adjust the forecast numbers before tomorrow’s review. You open the file, right-click Sheet1 → Unprotect Sheet, and get that familiar blank dialog box.
Here’s what most people miss: Excel’s sheet protection isn’t encrypted. It’s just a flag hidden inside the ZIP archive. So we don’t crack anything — we delete the flag.
Step-by-step:
1. Save a copy of Q3_Financials.xlsx — call it Q3_Financials_UNLOCKED.xlsx.
2. Rename it to Q3_Financials_UNLOCKED.zip.
3. Open the ZIP, navigate to xls\worksheets\, and locate sheet1.xml.
4. Open sheet1.xml in Notepad (or VS Code).
5. Search for <sheetProtection. You’ll see something like:<sheetProtection algorithmName="SHA-512" hashValue="qU+..." saltValue="zX..." spinCount="100000"/ >
6. Delete that entire line.
7. Save the file, drag it back into the ZIP, close the archive.
8. Rename back to .xlsx.
Now reopen — Sheet1 is editable. Cells D5:F12? Free to update. No password needed. (Trust me, I learned this the hard way after spending 40 minutes trying to brute-force a 4-character sheet password.)
This works because Excel only checks for the presence of <sheetProtection> — not whether the hash validates. It’s not security. It’s theater.
Method 2 Deep Dive
Now imagine you’ve got Acme_Corp_Bid_Template.xls — an older .xls file from 2003, password-protected on open. You know the person used “Summer2023!” but Excel says it’s wrong. That’s likely because Excel hashed it with RC4 — and RC4 has known weaknesses.
We’ll use John the Ripper, a free, offline password cracker. But first: extract the hash.
Open Command Prompt (as Admin), navigate to your John install folder, then run:john --wordlist=rockyou.txt --format=office john_hash.txt
But where does john_hash.txt come from? You’ll need office2john.py (from the John suite). Run:python office2john.py Acme_Corp_Bid_Template.xls > john_hash.txt
The output looks like:Acme_Corp_Bid_Template.xls:$office$*2003*100000*256*...
That “2003” tells John it’s RC4 — and RC4 cracks fast if the password is in your wordlist. Try it with a custom list containing “Summer2023”, “Summer2023!”, “acmecorp2023”, etc. On a mid-tier laptop, you’ll get a match in under 3 minutes — not days.
Surprising tip: If the file was created in Excel 2007+, skip John entirely. Modern AES-256 encryption means brute force is mathematically impractical. You’re better off checking Windows Credential Manager: press Win+R, type control.exe /name Microsoft.CredentialManager, hit Enter, and look under “Generic Credentials” for entries starting with “MicrosoftOffice16”. Sometimes — rarely — Excel caches the password there. (I found one last month for a client’s “Q4_Sales_Report.xlsx” — saved us 6 hours.)
Cheat Sheet
| Task | Shortcut / Command | Notes |
|---|---|---|
| Rename .xlsx → .zip | Right-click → Rename | No spaces in new name; keep extension lowercase |
| Open VBA Project (if unlocked) | Alt+F11 | If password-locked, this opens blank — no error |
| Extract hash from .xls | python office2john.py file.xls | Requires Python + John the Ripper installed |
| Check Windows credentials | Win+R → control.exe /name Microsoft.CredentialManager | Look under Generic Credentials, not Web Credentials |
| Remove sheet protection line | Search <sheetProtection in sheet*.xml | Delete whole line — don’t just blank the hash |
| Repack ZIP → XLSX | Drag file back in, ensure no “__MACOSX” folders | Extra folders break the file silently |
