Flickr Specifications

Photo Upload (Free)

Max File Size	200 MB
File Formats	JPG, PNG, GIF
Notes	Free accounts limited to 1,000 photos; images stored at original resolution

Photo Upload (Pro)

Max File Size	200 MB per file; unlimited storage
File Formats	JPG, PNG, GIF, TIF
Notes	Pro accounts get unlimited uploads and original file storage including RAW-adjacent TIF

Maximum Pixel Dimensions

Dimensions	No cap on resolution
Notes	Flickr stores and serves original dimensions; largest sizes served up to 6144 px on the long edge in-browser

Video Upload

Max File Size	1 GB (Pro)
File Formats	MP4, MOV, AVI, WMV
Max Duration	Up to 3 minutes
Notes	Videos stored at up to 1080p; transcoded for web playback

Buddy Icon (Profile Photo)

Dimensions	100 × 100 px minimum; 512 × 512 px recommended
Aspect Ratio	1:1
Max File Size	10 MB
File Formats	JPG, PNG
Notes	Displayed alongside photos, comments, and in groups

Cover Photo

Dimensions	2048 × 462 px recommended
Aspect Ratio	~4.43:1
Max File Size	200 MB
File Formats	JPG, PNG
Notes	Banner image shown at the top of the photostream; any uploaded photo can be set as cover

Photo Title

Character Limit	255 characters

Photo Description

Character Limit	No hard limit characters
Notes	Supports a subset of HTML tags including links and basic formatting

Tags per Photo

Character Limit	75 tags tags
Notes	Each tag up to 255 characters; spaces create separate tags unless quoted

Profile Display Name

Character Limit	64 characters

Profile Description

Character Limit	No hard limit characters

Video Upload

Max File Size	1 GB
File Formats	MP4, MOV
Resolution	Up to 1920 × 1080 px
Max Duration	Up to 3 minutes
Notes	Pro accounts only; transcoded and served at up to 1080p via HLS

Flickr Ads

Notes	Flickr uses third-party display advertising on free accounts; standard IAB formats (300×250, 728×90) served via partner ad networks