Resize for Instagram portrait posts (1080×1350)
Preset to 1080×1350 px (4:5). Photos with a different ratio are centre-cropped to fill the frame (cover); switch to contain to add margins instead.
High-quality Lanczos-family resampling is used. Platforms change their recommendations, so check their current guidance before posting.
Your file is never uploaded — it is processed inside this browser.
Example
Example generated with this tool. ZIP tools show their preview; inspect the downloaded archive for every file.
Resize image
Set width and height, with optional aspect-ratio lock.
How it works
- Open the source file
- Choose the processing mode and settings
- Run, inspect the result and download
Supported formats
PNG / JPG / WebP / AVIF / HEIC → PNG — Input decoding and output encoding depend on browser support. Animated inputs are rejected; select a still frame first.
What this tool does
Tiled high-quality mks2013/Lanczos resampling, numeric dimensions and size helpers.
Implementation and verified quality
advanced · Pica tiled mks2013 / Lanczos. Quality qualification is in progress. Pro/Flagship quality has not been established.
Before you export
Actual device memory, storage and codec support. Tested examples are evidence, not a guarantee for every file.