How do I repair a corrupt MDF file with this SQL database repair software?

Follow 5 Simple Steps Step 1: Install and launch 4n6 SQL Database Repair Software. Step 2: Select the corrupt MDF or NDF file. Step 3: Run the scan and wait for it to finish. Step 4: Preview the recovered tables and records. Step 5: Export to a live SQL Server, or save.sql scripts and CSV files. The scan never asks SQL Server to attach the file, so it works even on databases the server cannot bring online.

4n6 SQL Database Repair Software to repair corrupt MDF files

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4n6 Software
SQL Database Repair Software

Repair Corrupt MDF and NDF Files, Recover Deleted Records and Bring Your SQL Server Database Back Online

(Average Rating 4.6 Based on 565 Reviews)

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100% Safe & Secure

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30 Days Money Back* Guarantee

🔒 Read-only scan, source file never modified 💻 No SQL Server needed for the scan

MDF recovery tool that repairs corrupt MDF and NDF files without any file size limit
Recover deleted records lost to a DELETE command straight from the data file
Recover tables, views, triggers, stored procedures, indexes and keys in one scan
Works even when the LDF is missing because the MDF alone is enough
Exports recovered data to a live SQL Server or saves it as .sql scripts and CSV
Never alters the source file since everything runs read only

Demo limit: the free SQL repair tool exports 10 records from each table. A licence unlocks unlimited export and the 30-day money back guarantee*.

SQL Database Repair Tool

4n6 SQL Repair Software Reads a Damaged MDF File Page by Page

SQL Server cannot read past the damage when a data file is badly corrupted. That is why attach, DBCC repair and restore all fail on the same file. The 4n6 SQL database repair tool takes a different route. It opens the MDF or NDF file without SQL Server and reads it page by page, so the engine never has to get past the broken part.

What this SQL recovery tool brings back in a single scan:

Tables with all their records
Triggers, indexes, rules and defaults
Views, stored procedures and functions
Deleted records that still sit inside the MDF file

repair suspect database sql server preview

Repair a Suspect Database or One Stuck in Recovery Pending

Standard fixes stop working once a SQL Server database throws an I/O error, gets marked SUSPECT or refuses to come out of RECOVERY_PENDING. These failures land on a DBA's desk at the worst possible time. The 4n6 SQL database repair software gets around them by scanning the MDF or NDF file at the page level, without asking the SQL Server engine to open the database at all.

SQL Server errors this repair tool works around

Database marked SUSPECT and will not come online
Stuck in RECOVERY_PENDING after startup recovery fails
DBCC CHECKDB fails or says it needs repair with data loss
Error 5171: not a primary database file
Msg 823 / 824 I/O and consistency errors
Records lost after a DELETE command

Run a free scan on your file first. The preview shows what the tool can recover before you commit to anything.

Already Tried the Built-In Fixes?

Where DBCC CHECKDB Stops, 4n6 SQL Database Repair Starts

Most DBAs reach for a backup restore or DBCC CHECKDB first, as they should. This repair tool exists for when those do not work.

Native SQL Server Methods

DBCC CHECKDB with REPAIR_ALLOW_DATA_LOSS may bring the database back. It also deletes damaged pages and every row on them
EMERGENCY or SINGLE_USER mode gives read only access at best, and only if SQL Server can still read the file
Restore from backup works well, but only if the backup is recent and undamaged
All three need SQL Server to read past the damage, the very thing corruption prevents

4n6 SQL Database Repair Software

Reads the MDF or NDF directly at page level and never involves the SQL Server engine
No forced data loss. Recoverable pages are rebuilt and nothing is thrown away to force consistency
Works on databases that the server cannot even attach (SUSPECT, RECOVERY_PENDING, error 5171)
Free demo shows what is recoverable before you commit. If the preview has your tables, the export will have them too

Software Working

Repair a Corrupt MDF File in 5 Steps

No T-SQL and no server connection needed for the scan. Point the SQL repair tool at the file and start.

Software Process

Watch 4n6 SQL Database Repair Software Work From Start to Finish

Software Features

What Makes 4n6 SQL Database Repair Software Different

MDF Repair Tool That Works at the Page Level

Repair corruption from disk faults, power outages or abrupt shutdowns by reading the raw file structure directly. The software then rebuilds schema, tables and data with no dependency on the SQL Server engine at any point.

Recover Deleted Records From SQL Tables

Rows removed by a DELETE command usually survive in unallocated space until something overwrites them. This SQL repair software finds them, rebuilds the original records and lists them in the preview so you can check them before export.

Recover a SQL Database Without the LDF File

The transaction log is not needed. A lost, mismatched or corrupted LDF does not block the rebuild. The tool reconstructs schema and data from the MDF file alone and exports a database that attaches on a working server.

Ransomware-Hit MDF Files

If the ransomware did not damage every part of the MDF file, this SQL database repair software scans what is left and recovers the tables and records still intact, without ever needing the database online.

ROW and PAGE Compression Support

Many recovery tools misread compressed tables. This 4n6 SQL recovery tool decompresses and rebuilds ROW and PAGE compressed data with every column value and data type intact.

Supports All SQL Server Data Types

Handles ASCII, Unicode, XML, numeric, character and binary column types. Multi-language text and structured fields come back without character loss or broken formatting.

One Scan Mode, Zero Guesswork

There is no quick-versus-deep decision to get wrong before the repair starts. The tool applies a single scanning method to every file, whether this is your first recovery or your 50th.

Save the Scan, Resume Anytime

Big files take time to scan. With this SQL recovery software you save the completed scan to disk, close the application and pick the recovery up later exactly where it stopped. No rescanning.

Direct Export to a Live SQL Server

Export repaired tables, views and records into a new or existing database over Windows or SQL Server authentication. Or skip the server and save .sql scripts and CSV files instead.

Version detection is automatic too: the MDF repair tool reads the file header and identifies anything from SQL Server 2000 through 2025, including 2005, 2008 R2, 2012, 2014, 2016, 2017, 2019 and 2022, with no manual selection.

Why Choose 4n6

4n6 SQL Repair Tool Is Built So a Recovery Can Never Make Things Worse

Writes to Your File

The source MDF is opened strictly in read only mode. Scan it a hundred times and it stays byte for byte identical.

∞

File Size Limit

There is not one. A 40 GB production database scans the same way as a 50 MB test file.

Years of SQL Server

Supports every release from 2000 to 2025 including Express editions. The version is detected automatically.

100%

Local Processing

Scan, preview and export on your own machine. Your database never leaves your computer.

Run the Free Scan Now

Pricing: Free Demo vs Full Version

SQL Database Repair Software Price: See Your Data First, Then Decide

Both editions of this SQL database recovery software run the same scan engine. The demo is the proof and the licence is the export.

Free Demo

Prove the data is recoverable

Scan any corrupt MDF or NDF of any size
Automatic SQL Server version detection
Full preview of every recovered object
Deleted records visible in the preview
Export up to 10 records per table

Free Download

Full Version

$99 / lifetime license

Get all of it back

Everything in the free demo, plus:
Unlimited record export from every table
Export directly into a live SQL Server
Save as .sql scripts and CSV files
Free technical support and version updates
30-day money back guarantee*

Buy Now at $99

Instant electronic delivery. Download link and activation key come by email within minutes

Software Specifications

4n6 SQL Repair Tool System Requirements & Download Details

Software Download

Free Download

Size: 82.4 MB

Version: 4.2

Trial Limitations

The free edition scans and previews everything and exports up to 10 records from each table. A licence unlocks unlimited export from every table.

Supported SQL Server

SQL Server 2025, 2022, 2019, 2017, 2016, 2014, 2012, 2008 R2, 2008, 2005 and 2000 with Express editions included. The version is detected from the file itself.

System Specifications

Hard Disk Space
131.1 MB of free space

RAM
Minimum 2 GB RAM

Processor
Intel® Core™ 2 Duo 2.4 GHz or higher

Supported Editions

Microsoft Windows: Windows 11 (64-bit), 10, 8, 7 (32-bit or 64-bit) & Windows Server 2025, 2022, 2019, 2016, 2012 R2, 2008

Product Guides

Electronic Delivery

Delivery is automatic. Once the payment is completed, the download link and activation key arrive by email within minutes.

Software Reviews

Recoveries Users Have Pulled Off With 4n6 SQL Database Repair

Tristan Hollis

IT Manager

Deleted Records ★★★★★

A junior admin ran a DELETE without a WHERE clause on a customer table. We used this SQL repair tool to scan the MDF file and pull the deleted rows back out before anyone downstream noticed.

Simon Carrington

Systems Engineer

Missing LDF ★★★★★

We lost the LDF file during a migration and only had a MDF file with no way to attach it in SQL Server. This software rebuilt the database from the MDF alone and let us export to a new SQL Server instance. Highly recommended.

Meera Krishnan

Database Administrator

SUSPECT Database ★★★★★

A disk failure flagged our main database SUSPECT. This 4n6 SQL Database Repair Software scanned the 40 GB MDF, the preview showed every table intact and we exported to a fresh instance.

Frequently Asked Questions

SQL Database Repair Software FAQs

Follow 5 Simple Steps

Step 1: Install and launch 4n6 SQL Database Repair Software
Step 2: Select the corrupt MDF or NDF file
Step 3: Run the scan and wait for it to finish
Step 4: Preview the recovered tables and records
Step 5: Export to a live SQL Server, or save .sql scripts and CSV files

The scan never asks SQL Server to attach the file, so it works even on databases the server cannot bring online.

Yes, as long as the deleted rows have not been overwritten by newer data. The SQL recovery tool scans the unallocated space inside the MDF file and rebuilds records removed by a DELETE command. No backup is needed.

Yes. Your data lives in the MDF, not in the transaction log. The software rebuilds the database from the MDF file alone, so a missing or damaged LDF file does not block recovery.

The tool supports SQL Server 2000 through 2025, including Express editions. You do not need to know which version wrote your file. The software reads the version from the file header and configures itself.

No. The original file is opened in read-only mode for the entire scan and repair process. The source MDF is never changed.

No. The SQL repair software repairs corrupt MDF and NDF files of any size, including multi-GB production databases and tables stored with ROW and PAGE compression.

A failing disk, bad RAM, a power outage mid-write, file header damage or ransomware are the usual causes. Whatever the cause, the first step is the same: scan the MDF with the free demo and let the preview show what survived.

Yes. The software runs on Windows 11, 10, 8 and 7. It also runs on Windows Server 2008 through 2025.

It depends on the file size and how much of it is corrupt. Small databases finish in minutes. Large multi-GB files take longer but run unattended. You can save the completed scan to disk and resume the recovery later without rescanning.

This tool repairs SQL Server data files, meaning MDF and NDF. If your problem is a .bak backup that fails to RESTORE because of corruption, contact our support team for advice on your case.

You do not have to. The source file opens read-only, so the scan cannot alter it. Working from a copy is still good practice during any recovery, and the 4n6 SQL database repair software handles a copied file exactly the same way.

Your Tables Are Probably Still in That MDF File. Find Out for Free.

Run the free SQL database repair scan on your corrupt MDF file now. The preview shows exactly what is recoverable before you pay a thing.

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Read-only scan · SQL Server 2000 to 2025 · Windows 11 to 7 · 30 days money back*

4n6 Software SQL Database Repair Software