What is PST?

PST (Personal Storage Table) is Microsoft Outlook's file format for storing emails, calendar events, contacts, and other Outlook data locally.

What is MBOX?

MBOX is a generic mailbox format that stores all email messages concatenated in a single text file, commonly used for email archiving and migration.

When Should You Use PST vs MBOX?

Use PST When...

Reach for PST when your priority is email archiving, outlook backup and migration — its uncompromising quality ensures every detail is preserved.

Use MBOX When...

Reach for MBOX when your priority is email migration, cross-platform email backup — its uncompromising quality ensures every detail is preserved.

PST vs MBOX: Key Differences

•PST and MBOX diverge on compression: lossless compression for the source, lossless compression for the target.
•Both formats share lossless compression, so quality behavior is similar across the two — file size differences come from algorithm efficiency rather than compression philosophy.
•Transparency: N/A
•File sizes: PST files typically range 1MB to 50GB and MBOX files 1MB to 10GB.
•PST is optimized for email archiving, outlook backup and migration while MBOX is designed for email migration, cross-platform email backup — choose based on your specific workflow needs

Advantages of PST

✓PST uses lossless compression tailored for Email archiving, Outlook backup and migration.
✓PST is supported natively on virtually every device, browser, and operating system.
✓PST files are bit-for-bit perfect, preserving every pixel and sample for professional work.
✓PST integrates seamlessly with all major creative tools and workflows.

Advantages of MBOX

✓At its core, MBOX relies on lossless encoding — a design choice that makes it perfect for Email migration, cross-platform email backup.
✓You won't run into compatibility issues with MBOX — it's a universal standard across platforms.
✓File size management with MBOX: larger files guaranteed to match the original exactly.
✓Every major application in the Email migration, cross-platform email backup space supports MBOX natively.

Common Use Cases for PST to MBOX Conversion

Long-term email preservation
Email forensic investigation
Mailbox consolidation after merger
Cloud email platform migration
Employee email export on offboarding
Historical email data mining

Industry Applications

E-discoveryEnterprise BackupCorporate GovernanceEmail ForensicsRegulatory AuditingRecords Management

Best Practices for PST to MBOX Conversion

→When converting PST to MBOX: verify that email headers, attachments, and folder structures are preserved
→Check that metadata (sender, date, subject, CC/BCC) transfers correctly to MBOX
→For large mailbox archives, consider splitting into smaller batches for more reliable conversion
→Verify that embedded images and rich text formatting render correctly in the output
→Always keep a backup of your original files before converting
→Choose the appropriate quality settings for your specific use case

Troubleshooting PST to MBOX Conversion

!Attachments missing in MBOX after converting from PST → verify attachment encoding and inline embedded files are preserved
!Email headers (From, Date, Subject) corrupted in MBOX → check MIME header encoding compatibility
!Folder structure lost converting PST to MBOX → some formats flatten the mailbox hierarchy during export
!Large mailbox conversion fails or times out → split the PST archive into smaller date-range batches

Related Email Converters

Convert PST to Other Formats

All Email Formats

PST

View all Email converters →

More Email tools

Convert to MBOX →Convert from PST →

Convert PST to MBOX Online - Free & Fast

Convert PST files to MBOX online for free. High-quality conversion with no registration required.

Email Converter

Upload or enter a URL to convert PST to MBOX instantly

Click to upload or drag & drop PST file

or paste from clipboard

.pst,.PST (max 100MB)

SSL EncryptedAuto-deleted in 1 hourProcessed securelyNo registration needed

Verifying security check…

About PST and MBOX

PST

PST (Personal Storage Table) is Microsoft Outlook's proprietary file format for storing emails, calendar events, contacts, and other Outlook data locally on disk. PST files are commonly used for email archiving, backup, and offline access to Exchange mailbox data.

MBOX

MBOX is a generic, platform-independent mailbox format that stores all email messages concatenated in a single file with standardized delimiters. Converting PST to MBOX enables cross-platform email migration and access through Thundermail, Apple Mail, and other open-source email clients.

Common Use Cases

Migrate Outlook email archives to Thunderbird or Apple Mail using MBOX format.
Convert corporate PST archives to MBOX for cross-platform email search and eDiscovery.
Transform PST backup files to MBOX for import into Linux-based email servers.
Export Outlook personal archives to MBOX for long-term email preservation in open formats.

Format Comparison

CompressionLossless → Lossless

TransparencySupported

Use CaseConvert from email archiving, outlook backup and migration to email migration, cross-platform email backup

File Size~1MB to 10GB after conversion

FAQs

Is converting PST to MBOX free?

Yes, GoConvertFile offers free conversion of PST to MBOX for files up to 100MB. No registration required.

How long does it take to convert PST to MBOX?

Most PST to MBOX conversions complete within seconds for standard-sized files. Larger files may take longer depending on the conversion complexity.

What is MBOX best used for?

MBOX is ideal for email migration, cross-platform email backup. MBOX - generic mailbox format for email storage and archiving

What file size should I expect after converting PST to MBOX?

File size after PST to MBOX conversion depends on the content complexity and quality settings. Both formats use similar compression approaches so sizes are comparable.

Related Tools

View all email converter converters

What is PST?

PST (Personal Storage Table) is Microsoft Outlook's file format for storing emails, calendar events, contacts, and other Outlook data locally.

What is MBOX?

MBOX is a generic mailbox format that stores all email messages concatenated in a single text file, commonly used for email archiving and migration.

When Should You Use PST vs MBOX?

Use PST When...

Reach for PST when your priority is email archiving, outlook backup and migration — its uncompromising quality ensures every detail is preserved.

Use MBOX When...

Reach for MBOX when your priority is email migration, cross-platform email backup — its uncompromising quality ensures every detail is preserved.

PST vs MBOX: Key Differences

•PST and MBOX diverge on compression: lossless compression for the source, lossless compression for the target.
•Both formats share lossless compression, so quality behavior is similar across the two — file size differences come from algorithm efficiency rather than compression philosophy.
•Transparency: N/A
•File sizes: PST files typically range 1MB to 50GB and MBOX files 1MB to 10GB.
•PST is optimized for email archiving, outlook backup and migration while MBOX is designed for email migration, cross-platform email backup — choose based on your specific workflow needs

Advantages of PST

✓PST uses lossless compression tailored for Email archiving, Outlook backup and migration.
✓PST is supported natively on virtually every device, browser, and operating system.
✓PST files are bit-for-bit perfect, preserving every pixel and sample for professional work.
✓PST integrates seamlessly with all major creative tools and workflows.

Advantages of MBOX

✓At its core, MBOX relies on lossless encoding — a design choice that makes it perfect for Email migration, cross-platform email backup.
✓You won't run into compatibility issues with MBOX — it's a universal standard across platforms.
✓File size management with MBOX: larger files guaranteed to match the original exactly.
✓Every major application in the Email migration, cross-platform email backup space supports MBOX natively.

Common Use Cases for PST to MBOX Conversion

Long-term email preservation
Email forensic investigation
Mailbox consolidation after merger
Cloud email platform migration
Employee email export on offboarding
Historical email data mining

Industry Applications

E-discoveryEnterprise BackupCorporate GovernanceEmail ForensicsRegulatory AuditingRecords Management

Best Practices for PST to MBOX Conversion

→When converting PST to MBOX: verify that email headers, attachments, and folder structures are preserved
→Check that metadata (sender, date, subject, CC/BCC) transfers correctly to MBOX
→For large mailbox archives, consider splitting into smaller batches for more reliable conversion
→Verify that embedded images and rich text formatting render correctly in the output
→Always keep a backup of your original files before converting
→Choose the appropriate quality settings for your specific use case

Troubleshooting PST to MBOX Conversion

!Attachments missing in MBOX after converting from PST → verify attachment encoding and inline embedded files are preserved
!Email headers (From, Date, Subject) corrupted in MBOX → check MIME header encoding compatibility
!Folder structure lost converting PST to MBOX → some formats flatten the mailbox hierarchy during export
!Large mailbox conversion fails or times out → split the PST archive into smaller date-range batches

Related Email Converters

Convert PST to Other Formats

All Email Formats

PST

View all Email converters →

More Email tools

Convert to MBOX →Convert from PST →

Convert PST to MBOX Online - Free & Fast

Convert PST files to MBOX online for free. High-quality conversion with no registration required.

Email Converter

Upload or enter a URL to convert PST to MBOX instantly

Click to upload or drag & drop PST file

or paste from clipboard

.pst,.PST (max 100MB)

SSL EncryptedAuto-deleted in 1 hourProcessed securelyNo registration needed

Verifying security check…

About PST and MBOX

PST

MBOX

Common Use Cases

Migrate Outlook email archives to Thunderbird or Apple Mail using MBOX format.
Convert corporate PST archives to MBOX for cross-platform email search and eDiscovery.
Transform PST backup files to MBOX for import into Linux-based email servers.
Export Outlook personal archives to MBOX for long-term email preservation in open formats.

Format Comparison

CompressionLossless → Lossless

TransparencySupported

Use CaseConvert from email archiving, outlook backup and migration to email migration, cross-platform email backup

File Size~1MB to 10GB after conversion

FAQs

Is converting PST to MBOX free?

Yes, GoConvertFile offers free conversion of PST to MBOX for files up to 100MB. No registration required.

How long does it take to convert PST to MBOX?

Most PST to MBOX conversions complete within seconds for standard-sized files. Larger files may take longer depending on the conversion complexity.

What is MBOX best used for?

MBOX is ideal for email migration, cross-platform email backup. MBOX - generic mailbox format for email storage and archiving

What file size should I expect after converting PST to MBOX?

File size after PST to MBOX conversion depends on the content complexity and quality settings. Both formats use similar compression approaches so sizes are comparable.

Related Tools

View all email converter converters