Online Access Repair

Upload .MDB or .ACCDB File for Online Recovery in Browser Works on Android, iOS, macOS, Linux,
and Windows without installing software.
The files will be automatically deleted from the server in 10 days.
-OR-

Access Repair Kit

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Download Access Repair Kit
for Windows — Free Local Preview 100% local offline processing on Windows PCs,
license from $25 to save data.

Repair Corrupted Microsoft Access Databases (.MDB & .ACCDB) - Online or Offline on Windows

Extract damaged tables, records, queries, indexes, and relational links from corrupted Microsoft Access databases (.mdb and .accdb) using two workflows powered by the exact same internal recovery engine. You can repair your database immediately online in any browser from a smartphone, tablet, Mac, or PC, or run 100% local offline recovery on a Windows computer with Access Repair Kit.

  • Online Recovery in Browser (All Devices): Upload your damaged .mdb or .accdb file on this page from any phone, tablet, Mac, or PC, inspect the analysis report, and download the rebuilt database after payment.
  • Offline Software for Windows (Access Repair Kit): Download and install Access Repair Kit on Windows to scan and preview recoverable data locally on your disk without sending files online. Saving recovered data requires a license from $25.
  • Supported Access Versions: Legacy Microsoft Jet (.mdb from Access 95, 97, 2000, XP, 2003) and modern Microsoft ACE (.accdb from Access 2007, 2010, 2013, 2016, 2019, 2021, 2024, and Microsoft 365).

Online Browser Recovery vs. Offline Access Repair Kit: Same Engine, Two Workflows

Both our web application and the downloadable Access Repair Kit for Windows execute the same low-level Jet/ACE page reconstruction algorithm. Because recovery depth is identical, you can select the workflow that matches your current device, file size, and security policy:

Decision Criterion Online Browser Recovery Access Repair Kit (Windows)
Supported Devices Phones, tablets, Mac, Linux, Windows Windows 11/10/8/7 and Server PCs
Internal Engine Core Jet/ACE byte-level scanner Identical Jet/ACE byte-level scanner
Data Privacy Encrypted upload to cloud server 100% local disk (never leaves PC)
Database Size Small to medium databases Any size up to the 2 GB Access cap
System Dependencies Zero local software or drivers needed Uses local Windows DAO/ACE to write output
Pricing Model Per-file payment before download Free preview; license from $25 to save

Choose Online Browser Recovery when: You are working from an Android phone, iPhone, iPad, Mac, or Chromebook, your Windows PC lacks Microsoft Access or DAO database drivers, or you want a single file repaired in the cloud without installing software.

Choose Access Repair Kit on Windows when: Your database holds sensitive financial, medical, HR, or client records under strict NDA/GDPR/HIPAA rules that forbid cloud uploads, or your file approaches the 2 GB limit and scans faster on a local SSD.

Pre-Repair File Check & 3 Mistakes That Permanently Ruin Recoverable Data

Before scanning your file online or in Access Repair Kit, run three quick checks in your file manager and avoid actions that overwrite surviving data pages.

30-Second File Verification Before Scanning (Back-End vs. Front-End, .ldb / .laccdb locks, >0 KB check)

  1. Locate the Back-End data file (not a Front-End shell): Split Access databases store forms and linked table shortcuts in a small desktop Front-End file while keeping actual records in a larger Back-End file (typically named Database_be.accdb on a shared server). Always scan the larger Back-End file that holds the physical tables.
  2. Copy the file away from stuck lock files (.ldb or .laccdb): If a crash occurred on a network share, copy the damaged .mdb or .accdb file into a clean local folder so lingering .ldb or .laccdb lock files and active cloud sync agents do not block reading.
  3. Verify the file size is above 0 KB: Check file properties to confirm the container retains byte volume; a 0-byte file contains no Jet/ACE data pages to extract.

3 User Actions to Avoid Immediately After an Access Crash

Action to avoid Why it matters
1. Editing or adding records after accidental deletion: Deleted rows remain physically recoverable inside 4 KB data pages only until new write operations overwrite those free page slots. Stop all modifications immediately and scan a copy of the file.
2. Saving output over the original damaged file: Writing reconstructed output into the broken source path or onto a failing USB flash drive permanently destroys unrecovered byte chains. Both our online service and Access Repair Kit read your source file non-destructively and create a brand-new database file.
3. Running recovery inside an active OneDrive or Dropbox sync folder: Background cloud synchronization locks database pages mid-write; always save your recovered database to a local non-synced folder first.

Access Error Diagnostic Matrix: Why Access Blocks Your File While Your Tables Survive

Microsoft Access stores structural definitions inside hidden system catalog tables (MSysObjects, MSysACEs, and MSysRelationships) near the start of the file, while your actual business records sit inside independent 4 KB data pages (or 2 KB pages in Access 97) across the container.

When an interrupted network write or power drop corrupts the file header or breaks a pointer inside MSysObjects, Microsoft Access aborts startup immediately. Our recovery engine bypasses the broken system catalog altogether, scanning raw 2 KB and 4 KB data pages byte-by-byte to extract your tables and records directly.

Access Error Code or Symptom What Is Broken Inside the File Recovery Forecast How the Engine Fixes It
Error 3343: Unrecognized format Corrupted header or MSysObjects table High (85–100% of tables) Bypasses header and scans raw 4 KB data pages
Error 3011: MSysDb not found Damaged root system catalog pointer High Rebuilds schemas from page signatures
Error 3197 / 3167: Record deleted Broken row pointer or Memo/OLE chain High Isolates damaged offset and saves intact fields
Error 3033: No permission (.mdw) Corrupted MSysACEs security or missing .mdw High Reads raw table pages bypassing ACL locks
Database hits 2 GB size limit 32-bit internal offset overflow High Extracts data streams beyond locked header
Deleted records or dropped tables Rows flagged as deleted in page headers High if unoverwritten Recovers uncompacted rows from raw pages

What the Engine Recovers vs. Technical Boundaries (Objects, AutoNumber & Passwords)

Both the online tool and Access Repair Kit focus on restoring your core relational tables, field types, and data records cleanly into a newly created database:

Database Object or Field Type Recovery Status Technical Details
Tables & Field Schemas Restored Reconstructs table definitions, field types, and properties
Active & Deleted Records Restored Extracts live rows and unoverwritten deleted records
AutoNumber, Memo & OLE Restored Preserves original AutoNumber IDs, Memo text, and OLE objects
Attachments & Multi-Valued Restored Recovers embedded .accdb attachments and lookup values
Indexes & Relationships Restored Rebuilds primary keys, table indexes, and relational links
SQL Queries (MSysQueries) Restored Recovers Select, Update, Append, and Delete query definitions
Forms, Reports, Macros & VBA Not transferred UI objects and compiled VBA code must be re-imported from backup

Password-Protected .MDB Files vs. AES-Encrypted .ACCDB Databases

Whether a password-protected database can be recovered without entering the password depends on the file format:

  • Legacy Jet .MDB files (Access 95–2003): Database passwords in .mdb files use a static header XOR mask without encrypting underlying data pages. Both the online service and Access Repair Kit extract tables from password-protected .mdb files automatically, even if the password is lost.
  • Modern ACE .ACCDB files (Access 2007–2024 / M365): Setting a password on an .accdb file applies cryptographic AES encryption to every 4 KB data page, meaning encrypted .accdb containers cannot be parsed without decrypting the file first.

How to Recover and Verify Your Access Database in 3 Steps

Select either the browser workflow or the local Windows software workflow below. Both require only basic computer skills:

Option A. Recover Online in Any Browser (Mobile, Tablet, Mac, or PC)

  1. Upload your damaged database: Click the upload button at the top of this page and select your corrupted .mdb or .accdb file from your smartphone, tablet, Mac, or PC.
  2. Verify the automated analysis report: Review the list of reconstructed tables, field structures, and recovered record counts displayed in your browser after scanning completes.
  3. Pay and download the rebuilt file: Complete the single-file payment and download your clean, ready-to-open Access database.

Option B. Recover Offline on Windows with Access Repair Kit (100% Local Privacy)

  1. Install and select your file on Windows: Download, install, and launch Access Repair Kit on your Windows computer, then choose your corrupted .mdb or .accdb file.
  2. Inspect tables and records in Free Preview: Browse the reconstructed table tree in the preview pane for free—verify that your critical tables, record counts, AutoNumber keys, and Memo fields are present while all data remains 100% offline on your PC.
  3. Register a license (from $25) and save: Purchase a license key starting at $25 to unlock file saving and export the recovered structures into a new database on your local drive.
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Troubleshooting & Edge-Case FAQ

Can the tool recover tables that are linked to an external SQL Server, SharePoint list, or ODBC database?

The recovery engine extracts all local tables physically stored inside your .mdb or .accdb file and preserves linked table definitions, but records residing on an external SQL Server or SharePoint instance are stored on that remote server rather than inside the local Access file. If your local database only held ODBC links, reconnect those links in a new Access file directly to your SQL server.

What if my legacy .MDB database demands a missing Workgroup Security file (System.mdw) or shows Error 3033?

In legacy Access 97–2003 databases, User-Level Security permissions are enforced through the MSysACEs system table and an external .mdw workgroup file. Because our recovery engine scans raw data pages directly and writes recovered tables into a fresh database container without copying restrictive MSysACEs locks, you can recover your tables and records without needing the old .mdw file.

Does the engine keep original AutoNumber IDs so parent-child table relationships stay intact?

Yes. When reconstructing tables, the engine preserves the exact existing AutoNumber integer values on every recovered record rather than re-numbering rows sequentially, ensuring that foreign keys in related child tables continue pointing to the correct parent records.

Why did my Access database corrupt on a shared network drive or OneDrive folder, and how do I prevent repeat corruption?

The Microsoft Jet/ACE engine relies on continuous byte-range locking across 4 KB pages. Brief Wi-Fi drops, VPN timeouts, SMB opportunistic locking glitches on NAS drives, or background cloud sync tools (OneDrive, Dropbox, Google Drive) interrupt multi-user page writes and corrupt MSysObjects. To prevent repeat failure, split production databases into a server Back-End over wired Ethernet and keep Front-End interface files on each user's local drive outside cloud-synced folders.

How to repair Access database file?

MS Access database repair tool

Access Repair Kit is arguably the best MS Access repair tool available on today's market. Combining a highly efficient database analysis and recovery core with a simple, clean and easy-to-understand interface, the product enables users to efficiently restore their Access databases after the most serious data corruption accidents. The program's intelligent engine takes advantage of a set of complex proprietary algorithms to identify and extract valuable elements of damaged mdb and accdb files to a safe location on the user's hard drive.

This MS Access database repair tool features a clean and lightweight wizard-based interface that is completely suitable for users with and without experience. The wizard almost completely automates the process of data recovery and makes it a matter of a few mouse clicks - even if the user has absolutely no hands-on experience with the program and doesn't know how to repair Access database file data. The program comes with a simple database viewer that lets users see recoverable items and get a general idea about the scale of damage inflicted to the file.

How to repair Access database file?
Microsoft Access file repair tool

This Microsoft Access repair tool supports recovery from standard mdb and accdb database files of any size and structure and repairs the most important database elements, including tables, table data, queries, links between tables and even previously deleted records. Due to Access format limitations, the software does not recover database forms, macros, modules and password-protected files. Unlike many competitors, this Microsoft Access file repair tool does not require any frameworks, libraries, additional components or utilities to be downloaded and installed prior to database recovery.

This Microsoft Access repair tool can save regular users an ample amount of time and money, since they won't need to look for and hire an expensive specialized service to restore a single database file. Corporate users and IT professionals dealing with the consequences of MDB file corruption on a regular basis will benefit from the dramatically reduced downtime and speed of recovery offered by the product.

Microsoft Access file repair tool

The key features of Access Repair Kit:

  • Fast and easy recovery of .MDB and .ACCDB database files of Microsoft Access
  • A state-of-art database analysis and recovery engine leveraging the power of several intelligent algorithms to extract the maximum of data
  • An intuitive wizard-based UI that makes the recovery procedure a snap even for complete novices
  • Extraction of data to a healthy Access database file
  • Recovery of previously deleted database data
  • Recovery of tables, table data, queries and links between tables
  • No additional components needed - the product is ready for MDB file recovery immediately after installation
  • Compact installation file that takes seconds to download
  • Access Repair Kit and online repair service repairs corrupted databases of Microsoft Access 2003, 2007, 2010, 2013, 2016, 2019, 2021 and Access for Microsoft 365.

A free demo version of the program is available for download from the official website.

The Access file repair software does not recover:

  • forms;
  • macros;
  • modules;
  • password protected files.

System requirements:

  • Windows 98/Me/2000/XP/Vista/7/8/10/11 or Windows Server 2003/2008/2012/2016 and above
  • Microsoft Access 2003 or higher installed

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Trust Signals, Technical Expertise, and File-Safety Details

File Master maintains this page and connects the Access Repair Product content with the author's profile, the company profile, legal documentation, and support pages. These references help both visitors and search engines identify who is accountable for the information provided.

Content Author and Technical Reviewer

Victor G. Bobrov
Victor G. Bobrov
Chief Software Engineer and Access Database Recovery Specialist

Victor G. Bobrov is identified as the writer and technical reviewer of this Access Repair Guide. The page's structured data also recognizes him as the creator of the Access Repair Kit.

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Confirmed Company Information

This page links File Master with its verified corporate profile and legal business information:

  • File Master company profile
  • Legal entity: File Master LLC
  • Customer assistance: File Master support

Secure Processing of Access Database Files

  • When working with private database archives, use the offline desktop version of Access Repair Kit so the files remain stored on your own computer.
  • Always create a duplicate before attempting to open or repair a damaged .ACCDB or .MDB database, and preserve the original file without changes.
  • The Online Access Repair Service is available as an alternative when installing desktop software is not practical.
  • Links to the EULA, privacy policy, and support resources remain accessible on the page to provide clear information for users.

Editorial notice: The author, company, and policy references displayed on the page correspond to the JSON-LD entities included in the page source.

Prices

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About File Master LLC

GOLD Partner

File Master LLC is a Microsoft Gold Certified Partner

This certification demonstrates our commitment to technical excellence, deep expertise in Microsoft technologies, and the ability to deliver high-quality solutions for Microsoft Access database recovery and file repair.

Victor G. Bobrov, leading specialist at File Master
✦ Company specialist

Victor G. Bobrov

Victor G. Bobrov works with File Master on file structure analysis, damaged file recovery, database recovery and online repair services.

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Contacts

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Vancouver, BC V6H 4E4, CANADA
Email: email

Customer's reviews and ratings

perfect

Jomagar 11-10-2025

Very good

KAROL 09-03-2025

ok

Archivo 08-04-2025

good

Julienne 06-30-2025

Excellent

Vinicio 05-26-2025

Good Job

Reykun 03-30-2025

awesome

ubu 01-26-2025

good

twa 10-20-2024

Very good

Melisa 08-25-2024

Excellent

Jan 02-25-2022

The program was able to remove unwanted changes are made to the file that caused damage.

SC @PitokRugrat 02-26-2021

After trying to change the table structure using a third-party program, my database became corrupted. Now, when opening a file in Microsoft Access, it throws an error like "an unrecognized database format." Several tables were restored by using this site, but not the entire database. Failed to restore macros and forms.

unwarlikestep 02-28-2020

good

dafi

plus: Italian support
minus: costs $10 per file

Marrioo

good app

ji

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hernan

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sarah

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nichole

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Angel Maya

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