Can I resize multiple images at once?

Yes! When you upload multiple files, your chosen resize configuration will be applied to all uploaded images simultaneously.

What is the ideal size for an Instagram post?

The recommended size for square Instagram posts is 1080 x 1080 pixels (1:1 ratio), which is available directly in our preset selector.

Does resizing reduce the file size as well?

Yes, reducing the physical pixel dimensions of an image substantially lowers the overall byte count and file size.

Is there a limit on how large my source files can be?

You can upload files up to 25 MB each. Modern devices easily handle multi-megapixel photos in memory.

Resize Image for TikTok Vertical Post

Scale covers and still frames to TikTok’s vertical 1080×1920 canvas so nothing important gets cropped.

Advertisement728 × 90 Leaderboard

or drag & drop here

Supports JPG, PNG, WebP, GIF, BMP · Up to 25MB per file · Paste via Ctrl+V

100% Private (Runs locally in browser)

Instant processing with Web APIs

Zero files stored on servers

How to Resize Image in 3 Simple Steps

Streamlined, browser-native workflow designed for speed, privacy, and flawless results.

Upload Files

Upload one or more photos to resize.

Adjust Parameters

Set target width and height or pick a social media preset (Instagram, YouTube, etc.).

Download Ready File

Download your resized images instantly or bundle them in a ZIP.

Browser-Native Engineering

Enterprise-Grade Quality Without the Privacy Risks

Traditional image tools upload your personal photographs and client assets to third-party cloud servers. PixelsKits leverages modern Canvas APIs to perform every operation directly on your device.

Pixel-level precision with optional aspect-ratio lock.

Percentage scaling mode from 10% up to 200%.

One-click presets: Instagram Post (1080x1080), YouTube Thumbnail (1280x720), Facebook Cover (820x312), Passport Photo (413x531).

High-fidelity resampling to prevent pixelation and artifacts.

Option to prevent upscaling smaller images to maintain sharpness.

Technical Assurance

All pixel transformations run locally — your files never leave this browser tab.

File Storage:0 KB on Server

Target Keyword:resize image online

Cost:100% Free Forever

Frequently Asked Questions

Common questions about using our Resize Image tool.

Not if you keep the "Lock Aspect Ratio" toggle checked. The tool will automatically calculate the proportional height when you alter the width and vice versa.

More Image Tools You Might Like

Compress Image

Reduce image file size dramatically without sacrificing visible quality.

Crop Image

Trim photos with an interactive crop box and standard aspect ratio presets.

Rotate Image

Rotate photos 90° clockwise, counterclockwise, or flip horizontally & vertically.

Convert to JPG

Transform PNG, WebP, GIF, or BMP images into standard, universally supported JPG.