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PDF & email attachment size limits (2026)

Upload limits for Gmail, Outlook, messaging apps, job portals, and government sites — with links to official documentation.

Last reviewed: June 2026 · Ethan Brooks

Email providers

ServiceMax attachmentNotesSource
Gmail25 MBPer message; total message size includes encoding overhead (~33 MB raw file theoretical max before encoding)Google Help
Outlook / Microsoft 36520–34 MBDefault 20 MB; admins can raise to 34 MB (150 MB with OneDrive large attachment)Microsoft Docs
Yahoo Mail25 MBPer email attachmentYahoo Help
Proton Mail (Free)25 MB (paid) / 1 MB free tierVaries by planProton Support

Messaging & collaboration

PlatformMax fileNotes
WhatsApp100 MB (documents)Images/video limits differ; PDF sent as document
Slack (Free/Pro)1 GB (paid) / 5 MB freePlan-dependent
LinkedIn messaging20 MB (approx.)Attachment limits not always published; compress for reliability
Microsoft Teams250 GB (SharePoint) / chat ~250 MBLarge files use SharePoint link

Job portals & applications

PortalTypical PDF capNotes
Many ATS / career pages2–5 MBResume PDFs; compress aggressively
Indeed (employer upload)Varies by employerOften 2–10 MB for applications
Government job portals (India)1–10 MBUPSC, SSC, state portals often specify per notification

Government & tax portals (India focus)

PortalTypical limitNotes
GST Portal (supporting docs)5 MB (common)Per document type; verify current GSTN circular
Income Tax e-filing2–5 MBForm attachments vary by ITR type

Always verify limits on the live portal — caps change with policy updates.

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Methodology

Limits sourced from official vendor documentation and portal help pages as of June 2026. Where vendors publish ranges, we show the conservative figure for PDF uploads. Report corrections via contact.