Image Resizer

Resize any image to exact pixel dimensions with optional aspect-ratio lock and social-media presets — processed privately in your browser.

Click to choose an image or drag & drop here

JPG, PNG or WebP — processed locally, never uploaded

100% private — resizing runs in your browser only.

How to Resize an Image

  1. Choose your image — click the box or drag and drop.
  2. Enter width and height in pixels, or pick a preset (Instagram, Full HD, story…).
  3. Keep "Lock aspect ratio" checked to avoid stretching — the other dimension adjusts automatically.
  4. Click Resize, review the preview, and download.

Want a smaller file size at the same dimensions instead? Use the Image Compressor. Need a different format? Try the WebP Converter. Need a document? Try Images to PDF.

Image Size Cheat Sheet (2026)

The dimensions people resize to most often — all available as one-click presets above:

UseSize (px)Ratio
Instagram post1080 × 10801:1
Instagram / TikTok / YT Shorts (vertical)1080 × 19209:16
YouTube thumbnail / Full HD1920 × 1080 (1280 × 720 min)16:9
Social link preview (og:image)1200 × 6301.91:1
Facebook cover851 × 3152.7:1
Website hero / blog header1920 × 1080 or 1600 × 90016:9
Email-friendly photo800 × 600 or smaller4:3

Pixels vs DPI: for screens and the web, only pixels matter — DPI is a print-only setting. A 1080×1080 image looks identical on Instagram whether it's saved at 72 or 300 DPI.

Resize Down, Not Up

Shrinking an image (say 4000×3000 → 1920×1440) keeps it crisp because pixels are merged. Enlarging (800×600 → 1920×1440) forces the browser to invent pixels, which looks soft or blocky. If you must enlarge, keep it under about 1.5× the original and prefer PNG output to avoid adding JPG artifacts on top.

Resizing is also the fastest way to cut file size: halving width and height removes ~75% of the pixels, which typically shrinks a photo's file size by a similar amount before any compression is applied.

Frequently Asked Questions

Will resizing reduce my image quality?
Making an image smaller keeps it sharp. Enlarging beyond the original dimensions can't add detail and may look soft — for best results, resize down rather than up.
Is my image uploaded to a server?
No. Resizing happens entirely in your browser using the HTML5 Canvas API. Your image never leaves your device.
What are common image sizes?
Popular sizes: 1920×1080 (Full HD), 1280×720 (HD), 1080×1080 (Instagram post), 1080×1920 (story/reel), 1200×630 (social link preview) and 851×315 (Facebook cover). All are available as presets above.
How do I resize an image without stretching it?
Keep the aspect-ratio lock enabled: type a new width and the height adjusts automatically in the same proportion, so the picture is scaled instead of stretched or squashed.
Does resizing change the file size in KB or MB?
Yes — fewer pixels means a smaller file; halving both dimensions roughly quarters the pixel count. If you need the same dimensions but a smaller file, use the Image Compressor instead.
Which output format should I choose — JPG, PNG or WebP?
JPG for photos (small files), PNG for sharp edges and transparency (logos, screenshots), WebP for the smallest files overall — supported by every modern browser.