Image Compression Tool

Reddit Photo Resizer – Compress Any Image to Under 500KB

Updated June 2026 3 min read Browser‑based

Reddit limits image uploads to 20MB, but many subreddits prefer smaller files for faster loading. Our Reddit Photo Resizer instantly compresses your JPG or PNG images to under 500KB while maintaining excellent visual quality. No upload to any server – all processing happens right in your browser.

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Click or drag & drop an image (JPG, PNG)

500KBTarget file size

JPG/PNGSupported formats

No uploadPrivacy‑first

🔥Reddit‑ready

Why Use a Reddit Photo Resizer?

Reddit's max upload size is 20MB, but many subreddits (especially those with high traffic) recommend smaller images for quick loading. A 500KB image loads almost instantly on mobile and desktop. Our Reddit Photo Resizer helps you meet those expectations without complicated software.

How to Compress an Image to Under 500KB

Upload your image – click the upload area or drag & drop a JPG or PNG file.
Preview original size – see the original file size and a preview.
Click "Compress" – our tool automatically reduces quality and resamples until the file is under 500KB.
Download the result – save the compressed image and post it to Reddit.

The tool works entirely in your browser: your image never leaves your device. We use canvas and quality scaling to achieve the target size.

Who Needs This Tool?

Reddit users posting photos in comments or as image posts.
Anyone emailing images with attachment limits.
Forum members with file size restrictions.
Bloggers optimizing images for web pages.
Artists sharing work on platforms that cap file size.

How the Compression Works

The tool uses a binary search approach on JPEG/PNG quality levels (and downsamples resolution if needed) to get the image under 500KB. For PNG files, we can also re-encode as JPEG when appropriate because JPEG is usually more compact. The algorithm:

First, try to compress using quality settings (10–90).
If still over 500KB, we reduce the image dimensions by 10% iteratively.
Finally, we produce an image that meets the size limit while preserving as much quality as possible.

This method ensures you always get a usable file.

Frequently Asked Questions

Will this reduce my image quality?

Some quality loss is inevitable when compressing to 500KB, but our algorithm minimizes visible degradation. Most images look nearly identical to the original for social media and web use.

What formats are supported?

JPG and PNG. For PNG with transparency, we'll convert to JPEG (white background) to achieve smaller size, but you'll lose transparency. For graphics with sharp edges, PNG may still work if the original is small enough.

Is my image uploaded to a server?

No. Everything happens locally in your browser using JavaScript. Your image stays private.

What if my image is already under 500KB?

You can still compress it, but it's not necessary. The tool will tell you the original is already below the limit.

Can I compress very large images (over 10MB)?

Yes, but extremely large images may take a few seconds to process. The canvas can handle fairly large dimensions, but the final image will be resized as needed.

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Final Thoughts: Post Confidently on Reddit

Don't let file size limits prevent you from sharing your photos. With this Reddit Photo Resizer, you can compress any image to under 500KB in seconds. Bookmark this page for all your future image uploads, and enjoy faster uploads and happier subreddit moderators.