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Resize a photo to exact pixels or a percent — including Instagram, passport, and other presets.
Quick answer
TryQuickImg Resize Image changes pixel dimensions (Instagram, passport presets, or exact width/height) entirely in your browser — no upload and no watermark.
Offline note
After assets load, many browsers (Chrome/Edge/Firefox) can keep the tool usable offline. Some browsers (e.g. Tor) or private modes block service workers — the tool still runs online without uploading your files to our servers for processing.offline-ready ✓
Drop images to resize
Or click to browse — multiple files OK
Soft limit: about 40 files per round (very large batches can slow the tab). Drop again for the rest — processing is not uploaded to our servers.
Embed this tool
Paste this iframe on your site. Includes a backlink to Resize Image. Opens chrome-less with ?embed=1.
Pixels or percentage: which should I use?
Pixel resize sets an exact width and height — what Instagram, LinkedIn, and printers care about. Percentage resize scales relative to the original (50% of a 4000px photo is 2000px). Use pixels for platform requirements; use percent for a quick downscale before email.
What size should images be for social media?
Platform
Use
Pixels
Instagram
Feed post
1080×1080
Instagram
Story / Reels cover
1080×1920
YouTube
Thumbnail
1280×720
LinkedIn
Shared image
1200×627
X (Twitter)
Post image
1600×900
Passport-style
Square start
600×600*
*Official passport sizes vary by country — always confirm local rules.
Can I make a small image larger without losing quality?
Making a small image larger cannot invent real detail. Soft, blurry results are normal. Prefer shooting or exporting larger, then resize down.
Privacy
Resizing runs on your device. Files are not uploaded to our servers for processing.
Reduce image size: file size or dimensions?
"Reduce image size" means two different things, and picking the wrong one is the usual reason a photo still gets rejected after you have already made it smaller.
File size is how much space the file takes up, measured in KB or MB. This is what an upload form means when it says "maximum a size limit". Compressing lowers it by storing the same picture less precisely.
Dimensions are how many pixels wide and tall the image is — 600 × 800, for example. Resizing changes this. A form asking for specific pixel dimensions is not asking about file size, and the two limits are often set independently.
They interact, which is why the distinction matters in practice: fewer pixels means less to store, so resizing makes the file smaller too. If a portal sets both limits, resize to the required dimensions first and compress afterwards. Doing it the other way round throws away quality twice, and the result looks muddier than it needed to at the same final file size.
Why the file size does not drop evenly
Lowering quality does not shrink every photo by the same amount, because compression works by discarding detail the eye is least likely to miss. A portrait against a plain wall has large smooth areas and compresses hard. A photo of foliage, textured fabric, or a crowd holds detail in every pixel and resists compression, so it needs a lower quality setting — or fewer pixels — to reach the same target.
This is also why screenshots and images with text behave differently. Sharp edges and flat colour are exactly what JPEG handles worst, so text can turn fuzzy well before the file gets small. PNG or WebP usually holds those up better at a comparable size.
If you cannot reach the target without the picture visibly degrading, reduce the dimensions rather than pushing quality lower. Shedding pixels almost always looks better than crushing the ones you keep.
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Frequently asked questions
How do I resize to 1080×1080 for Instagram?
Click the Instagram post preset, drop your image, download. Aspect lock keeps proportions when you edit one side.
Does resizing reduce quality?
Shrinking usually looks fine. Enlarging beyond the original resolution invents pixels and looks soft — avoid large upscales.
Passport photo size?
Use the 600×600 preset as a starting point, then check your country’s exact mm/px rules.
Batch resize?
Yes — drop multiple files and download a ZIP. Very large drops process about 40 at a time so phones/low-RAM tabs stay usable; drop again for the rest.
