Resize Image
Resize photos and graphics with aspect-ratio presets and bulk support, right in your browser.
- Before/after preview
- Privacy-first
- No signup
Drag, drop, paste, or browse
JPG, PNG, WEBP, GIF, and AVIF up to 50 MB. Paste from clipboard with Ctrl+V.
Settings
Tune output without leaving the browser.
Pick a ratio to lock width and height together. "Source" preserves the original ratio of the loaded image; "Free" lets you set both dimensions independently.
Before / after preview
Compare the source image with the generated file.
Result download
Your processed image will appear here.
Guide
Useful to know
Aspect ratio presets
Pick a preset (1:1, 4:5, 4:3, 16:9, 9:16) to lock width and height together at that ratio. "Source" keeps the original image's ratio, and "Free" lets you set both dimensions independently. Useful pixel targets: 1080 x 1080 (Instagram square), 1080 x 1350 (Instagram portrait / 4:5), 1080 x 1920 (Instagram Story or Reel / 9:16), 1280 x 720 (YouTube thumbnail / 16:9), 1200 x 675 (Twitter/X).
Bulk resize
Drop multiple files in at once and ImgShifter resizes the whole batch to the same dimensions in your browser, then bundles the results into a ZIP via JSZip. The batch runs locally - no uploads, no queue, and no per-file size limits beyond your device's memory.
Downscale vs upscale
Downscaling is safe and often makes images look sharper. Upscaling beyond the original adds no real detail and tends to look soft - use a dedicated AI upscaler if you need that.
Resize online with ImgShifter
Drop one image or many - ImgShifter resizes the whole batch to the same dimensions in your browser, then bundles the results into a ZIP via JSZip. Aspect-ratio presets cover the common social and video sizes.
Downscaling is safe and often makes images look sharper. Upscaling beyond the original adds no real detail; for that, use a dedicated AI upscaler. The batch limit is whatever your device's memory can comfortably hold.
The resize uses the Canvas API locally. Files are never uploaded - watch the Network tab while a batch runs to confirm there's no outbound image traffic.
Keep going
Related tools
Other ImgShifter tools people use alongside Resize.
Compress
Reduce image file size with a quality slider and instant before/after stats. Powered by the jsquash MozJPEG, libwebp, AVIF, and Oxipng encoders.
Crop
Crop images with aspect-ratio presets, zoom controls, and a live preview.
Aspect Ratio
Change the aspect ratio of any image - 1:1, 4:5, 4:3, 3:2, 16:9, 21:9, and 9:16 presets, in your browser.
PNG to JPG
Convert transparent PNG images into lightweight JPG files in your browser.
Read
From the blog
Deeper guides related to Resize from the ImgShifter blog.
Image Too Large to Upload? How to Fix It on Any Device (2026)
Phone photos run 3 to 6MB and plenty of upload forms stop at 2MB. How to shrink, convert or resize an image so it uploads, on any phone or computer.
Read the guideInstagram Aspect Ratios 2026: The Complete Guide (Feed, Reels, Stories & Instants)
The practical, accurate guide to Instagram dimensions in 2026 - feed posts, Reels, Stories, carousels, ads, and the new Instants format. Safe zones, trade-offs, and export settings included.
Read the guideFAQ
Frequently asked questions
Short answers for image workflows, privacy, and supported formats.