Every upload limit in 2026

• Go over 25 MB and Gmail quietly swaps your attachment for a Google Drive link.
• Mail is encoded in transit, which inflates it by about a third. If your recipient's server is strict, aim for 18 MB.

Source: Google Gmail Help: attachment size limits

• Microsoft 365 work accounts default to the same 20 MB, but admins can change it.

Source: Email attachment limits compared (2026)

Source: Email attachment limits by provider (2026)

• Apple Mail offers Mail Drop automatically when an attachment is too big; the recipient gets a download link that lasts 30 days.

Source: Apple Support: Mail Drop limits

Source: Proton Support: attachment and email size limits

• Media gets recompressed by WhatsApp. Sending as a Document keeps full quality but loses the inline preview.

Source: WhatsApp file size limits (2026)

• Discord raised the free limit from 10 MB to 20 MB on 13 August 2026. Older guides still say 8 MB or 10 MB.

Source: Discord File Attachments FAQ , Discord raises free upload limit to 20MB

Source: Telegram file size limits (2026)

Source: Slack Help: add files to Slack

• If a message falls back to SMS/MMS, the real limit drops to what the carrier allows — often under 1 MB.

Source: Apple Community: iMessage attachment size

• Instagram downsizes anything wider than 1080 px, so bigger uploads just get recompressed by Instagram.
• Longer Reels (up to 15–20 minutes on some accounts) can be posted, but Instagram only recommends Reels of 3 minutes or less to people who don’t follow you.

Source: Buffer: Instagram image size guide 2026 , Instagram Reels length in 2026 , Instagram Reels over 3 minutes and recommendations

Source: Sendible: LinkedIn post size 2026 , LinkedIn Help: upload your resume

• Premium accounts can upload much longer videos (hours, not minutes).

Source: Sked Social: X image & video size guide 2026 , X video length limits 2026

Source: TikTok video size limits 2026

• The thumbnail limit rose from 2 MB to 50 MB on desktop in 2026, for 4K thumbnails. The YouTube phone app still stops at 2 MB, so keep a copy under 2 MB if you upload from your phone.
• Since 15 October 2024, square and vertical videos up to 3 minutes count as Shorts.

Source: YouTube Help: add video thumbnails , YouTube Help: three-minute Shorts

• LinkedIn, X, Slack, Discord, WhatsApp and iMessage all show a 1200 × 630 image well; X needs twitter:card set to summary_large_image to show it large.

Source: Meta for Developers: images in link shares

• The image must be in color, in the sRGB color space. iPhone photos are often HEIC and in Display P3 color — both get rejected. Convert to an sRGB JPEG first.
• A scanned print must be 2 × 2 in, scanned at 300 pixels per inch.

Source: US Department of State: digital image requirements

• The face must be 32–36 mm from chin to forehead (70–80% of the photo), in an ICAO-compliant photo no more than 6 months old.
• Each consulate and visa center sets its own digital file limit — 240 KB to 500 KB is typical. Check your portal.

Source: European Commission: ICAO photograph guidelines for Schengen visas , France-Visas: Schengen visa photograph instructions

• In color, taken in the last month, against a plain light-colored background, and not altered by software.

Source: GOV.UK: photos for passports

• Passport Seva’s ICAO guideline sets the 630 × 810 px size, a white background and a face filling 80–85% of the photo, with glasses taken off. The 10–250 KB range is what the portal is widely reported to accept; the guideline itself gives no file size.

Source: Passport Seva: guidelines for ICAO-compliant photographs , India passport photo size, as reported in 2026

• The 2026 notices have the application capture your photograph live, without cap or glasses; photographing an existing photo gets the application rejected. Only the signature is uploaded.
• Every exam notification can change these numbers. Always check the notice for your exam.

Source: SSC: CHSL 2026 notice, paragraphs 9.4–9.6

• Save the files as photo.jpg and signature.jpg. Both ears must show in the photo, and it must not be signed.

Source: UPSC: instructions for uploading the photo and signature

• Company career sites (Workday, Greenhouse, Lever…) each set their own cap. A text-based PDF under 2 MB clears almost all of them.

Source: LinkedIn Help: upload your resume

• Most shops convert to CMYK themselves. Send a high-quality JPEG or PNG in sRGB unless they ask otherwise.

Source: Hootsuite: image sizes guide (Sept 2026)