Which format is best for Instagram reach?

Portrait (4:5) takes up the most screen real estate in the feed, which can improve engagement.

Instagram Post Resizer

ResizeanyphototoallthreeInstagrampostformats:Square(1080×1080),Portrait(1080×1350),andLandscape(1080×566).Switchbetweenpresetswithoneclick.

Free forever100% PrivateNo uploadWorks offline

Processing happens in your browser · No upload

Click or drop your image here

JPG · PNG · WEBP — processed entirely in your browser

Square: 1080×1080Portrait: 1080×1350Landscape: 1080×566

This tool processes your image locally in your browser. Your file is never uploaded to a server, so nothing needs to be deleted afterwards — closing the tab removes it completely.

How to use Instagram Post Resizer

11
Upload your image
Drag&droporbrowse.Yourfilestaysonyourdevice—itisneveruploaded.
22
Adjust options
Setthecontrolsforthistool.
33
Download
Previewtheresult,checkthesize,thendownload.Use“Delete&startover”toclearitinstantly.

Key features

100%free—nosign-up,nowatermark
Runsinyourbrowser—imagesneverleaveyourdevice
WorksonChrome,Safari,FirefoxandEdge(desktop&mobile)

Why use Instagram Post Resizer?

InstagramPostResizeristhefastestprivatewaytogetthejobdone.Becauseeverythingrunslocallyinyourbrowser,therearenouploads,noqueuesandnoprivacyrisk—idealforIDs,documentsandpersonalphotos.Itisfree,unlimitedandworksonanydevice.

100%

Free

∞

Private

All

Devices

Benefits

Fast,accurateresultswithalivepreviewbeforeyoudownload.
Worksonanymodernbrowser,desktopormobile.
Yourfileisprocessedonyourdevice—thereisnoupload,soIDsandpersonalphotosstayprivate.

Common use cases

Everydayphotoeditswithoutinstallingsoftware.
Quickfixesonmobilewhenyou’reawayfromacomputer.

Helpful tips

💡

Previewtheresultbeforedownloading—youcanalwaysadjustandre-runinstantly.

Troubleshooting

⚠Myimagewon’topenorupload.: Makesureit’sasupportedformat(JPG,PNG,WEBP).HEICandcamera-RAWdependonyourbrowser;convertthemtoJPGfirstifneeded.
⚠Nothingisuploaded—isitreallyworking?: Yes.Thetoolrunsinyourbrowser,soprocessinghappensonyourdevicewithnoserverround-trip.Youcanevenuseitofflineafterthepageloads.