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Repair Excel Files Online: Fix Corrupted XLSX and XLS Workbooks

Q: How do I repair a corrupted Excel file online?

Upload the original XLSX or XLS file, let Fixo inspect the workbook package and worksheet records, start repair, and preview the recovered sheets, values, formulas, and objects before download.

Q: How do I fix "Excel found unreadable content" in an XLSX file?

Upload the original workbook without resaving it. Fixo checks worksheet XML, shared strings, styles, formulas, and object relationships that may trigger the warning, then rebuilds relationships supported by readable data.

Q: Can Excel repair recover formulas, named ranges, and cell references?

Fixo can retain readable formulas, named ranges, shared formulas, cross-sheet references, and calculation records that remain in the workbook. Deleted or missing formula records cannot be inferred, so review calculated results after repair.

Q: Can corrupted Excel charts and pivot tables be repaired?

Fixo inspects chart definitions, drawing relationships, pivot definitions, caches, source ranges, and filters that remain readable. Preview the repaired workbook to confirm that each object still points to the expected data.

Q: Should I rename or convert an Excel file with an invalid extension error?

No. Renaming XLSX to XLS, or the reverse, does not change the internal workbook format. Upload the original file so its real structure can be identified before repair.

Q: How long does online Excel repair take?

Most Excel repairs finish in about 1 minute. Large workbooks with many sheets, formulas, charts, pivots, links, or embedded objects may require more time.

Repair damaged XLSX, XLS, XLSM, XLSB, XLTX, and XLTM workbooks online when Excel finds unreadable content, reports an invalid file format, opens blank, or fails to save. Preview readable worksheets, values, formulas, tables, charts, and formatting before download.

See how Fixo repairs a corrupted Excel workbook online and prepares worksheets, formulas, and charts for preview.

Start Repairing Now

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Drop your Excel workbook here to start repair

or choose an Excel workbook from your device

Select Excel to Repair

View the full repair workspace

Supports XLS, XLSX, XLSM, XLSB, Your file stays private

Want faster and efficient local Excel repair?

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100%Safe & secure

20 Years+Repair experience

120 Million+Repaired files

~1 MinAverage repair time

Repair XLSX, XLS, XLSM, and Excel Template Files Online

Excel files may contain worksheets, shared strings, formulas, named ranges, styles, charts, tables, links, macros, and calculation records. Fixo identifies the workbook format and checks these connected parts instead of treating the file as a flat grid.

XLSX

Standard Open XML workbooks

XLS

Legacy binary Excel workbooks

XLSM / XLSB

Macro-enabled and binary workbooks

How Excel Workbook Corruption Affects Connected Data

Workbook damage can affect more than visible cells. Explore how corrupted package relationships may break sheet tabs, formulas, shared text, styles, charts, pivot data, external links, and calculation settings.

Workbook

Worksheets

Formulas

Charts

Styles

Workbook index and relationships

Connect sheet records, shared data, styles, names, external links, and calculation settings.

Visible and hidden worksheets

Inspect sheet files, tab order, visibility states, dimensions, merged cells, and drawing links.

Cell values and formula chains

Trace readable values, shared formulas, array formulas, named references, and cross-sheet links.

Tables, charts, and pivot data

Validate table definitions, chart series, drawing anchors, pivot caches, and source ranges.

Styles, shared strings, and formats

Reconnect number formats, fonts, fills, borders, cell styles, and shared text records.

Common Excel Errors and Corrupted Workbook Symptoms

Review the symptoms Excel users commonly search for, including unreadable content, invalid file format or extension, blank workbooks, formula errors, missing charts, and save failures.

Excel cannot open the file

The format or extension is reported as invalid, or loading stops before the workbook appears.

Unreadable content detected

A repair option Excel offers to recover records because worksheet or object relationships are inconsistent.

Workbook opens blank

Sheet tabs, cell data, or hidden content do not render even though the file has data.

Formulas return errors

Broken references, names, shared formulas, or calculation records produce empty or incorrect results.

Charts or pivots disappear

The visual object remains, but its data relationship or cached records cannot be read.

Changes cannot be saved

The workbook opens, but damaged package records block editing, copying, or saving.

What Excel Repair Can Recover from a Corrupted Workbook

Fixo repairs readable workbook parts and reconnects relationships that still exist between worksheets, values, styles, formulas, tables, and charts. Missing cells, formulas, links, macros, or chart data cannot be inferred when their original records are gone.

42,423

Unique Excel files processed

88.7%

Repair success rate

Among files containing repairable data

Last 12 months

Rolling measurement period

Counted by unique file

Repair success means the repair process completed successfully. The amount of content retained still depends on the source data remaining in the damaged file.

WORKBOOK LAYERS

Workbook and sheets

Sheet order, visibility, names, and workbook relationships

Shared strings and styles

Cell text, number formats, fonts, fills, and borders

Formulas and references

Formula expressions, named ranges, and sheet references

Charts, tables, and pivots

Connected objects and their source ranges

RELATIONSHIP CHECK

Review remaining workbook parts

Identify readable sheets, shared resources, and calculation records.

Check recovered relationships

Relink workbook parts where recoverable references remain.

Confirm usable content

Review values, formulas, sheets, charts, filters, and linked data.

Repair Excel Worksheets, Formulas, Charts, and Workbook Relationships

An Excel workbook connects worksheets, shared values, formulas, styles, charts, pivot definitions, macros, and package relationships. Fixo analyzes these parts together so you can verify business-critical values and spreadsheet behavior after repair.

Fix Excel files that will not open or show unreadable content

Fixo analyzes damaged XLSX, XLS, XLSM, XLSB, XLTX, and XLTM workbooks when Excel cannot open the file, reports unreadable content, or says the file format or extension is not valid. It maps readable workbook records before rebuilding worksheet relationships and package indexes.

Excel found unreadable content

Excel cannot open the file

File format or extension is not valid

Workbook opens blank

Recover formulas, values, links, and calculation logic

A workbook can open while formulas return errors, references break, or copied data cannot be pasted or saved. Fixo checks cell values, shared strings, formulas, named ranges, external links, and calculation chains so important workbook logic can be inspected after repair.

Rebuild charts, pivot tables, formatting, macros, and hidden sheets

Business workbooks depend on more than visible cells. Fixo inspects chart references, pivot definitions, filters, styles, conditional formatting, drawing anchors, macro-enabled package parts, and hidden worksheets so the repaired workbook can be validated beyond a simple file- open check.

Repair Excel online

How to Repair a Corrupted Excel File Online in 3 Steps

Upload the original Excel workbook, let Fixo inspect readable workbook records and rebuild recoverable relationships, then preview worksheets, values, formulas, and objects before download.

Upload the corrupted workbook

Choose the original Excel file and avoid resaving it before repair.

Check and repair workbook data

Fixo maps readable spreadsheet records and reconnects recoverable worksheet parts.

Preview and download

Check sheet tabs, key values, formulas, charts, and tables before download.

What to Check After Repairing an Excel Workbook

Opening the repaired workbook is only the first check. Review sheet tabs, key values, formulas, named ranges, charts, tables, pivots, filters, external links, and macro-enabled content where applicable.

All worksheet tabs

Key values and formulas

Charts, tables, and pivots

Formats, filters, and links

Repair and preview Excel

Online Audio Repair or Fixo Desktop?

Use the online tool for a quick single-file repair. Choose the desktop app for large files, batch jobs, offline work, and complex damage.

Advanced repair	Online repairFor a quick single file	Desktop repairFor larger or multiple files
Capability	Not available	Available
Best for	Quick repair in a browser	Large, batch, or more complex files
Formats supported	XLS, XLSX, XLSM, and focused workbook repair	More repair formats and file types
File size	< 100 MB	Unlimited
Batch repair	Not supported	Supported
Local & private processing	Processed over an encrypted connection	Processed locally; files never leave your device
Offline use	Internet connection required	Fully offline
Complex damage	Common structural damage	Advanced workflows for severe corruption
Premium technical assistance	Not supported	Supported
Access	Open the browser and go	Download and install
	Repair Excel Online No installation required	Download Fixo DesktopDesktop app download required

Frequently Asked Questions

How do I repair a corrupted Excel file online?

How do I fix "Excel found unreadable content" in an XLSX file?

Can Excel repair recover formulas, named ranges, and cell references?

Can corrupted Excel charts and pivot tables be repaired?

Should I rename or convert an Excel file with an invalid extension error?

How long does online Excel repair take?

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Excel Repair Case Studies and Workbook Checks

Each case records the Excel format, corruption symptom, repair result, and workbook-specific checks used to review sheets, values, formulas, and connected objects.

Budget workbook

Unreadable content

"After a power interruption, Excel found unreadable content in our budget model. I checked the formulas, named ranges, and pivot summaries in the repair preview before continuing the forecast."

Amir reviewed key worksheet tabs, calculation results, VLOOKUP references, and pivot totals before downloading the repaired workbook.

Amir S.

FP&A Analyst, Dubai

Verified repair record | Case FX-XLSX-0182

Inventory dashboard

Excel opens blank

"The workbook opened to a blank screen after a cloud sync conflict. The repaired preview brought back the hidden tabs, inventory charts, and conditional formatting we use every morning."

Elena compared visible and hidden sheets, filter settings, chart ranges, and color rules against the previous reporting cycle.

Elena V.

Supply Chain Manager, Warsaw

Verified repair record | Case FX-XLSX-0247

Macro-enabled report

Extension not valid

"Our XLSM report showed a format or extension error after a failed USB copy. I could verify the worksheet data, buttons, and macro-enabled structure before using the repaired file."

Daniel checked workbook sheets, linked tables, embedded controls, and the presence of macro package parts in the preview.

Daniel R.

Operations Analyst, Toronto

Verified repair record | Case FX-XLSX-0316

Repair your corrupted Excel workbook

Upload the original file, start repair, and preview the recoverable content before download.

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