Will compressing a PNG to 1 MB lose transparency?

No. The target-size tool and Resize PNG tool both preserve transparency. The PNG format supports alpha channels, and the tools do not strip them.

Can I get a PNG under 500 KB without reducing colours?

Yes, if the original image is large enough. Resizing to a smaller dimension, such as 1200 pixels on the longest edge, can reduce pixel count enough to meet 500 KB without palette reduction.

Why is my PNG still too large after resizing to 1920 pixels?

Some images, especially those with complex patterns or many colours, may still be over 1 MB at that size. In that case, you can resize to a smaller dimension or use the target-size tool, which will apply additional compression settings.

Is 1 MB the same as 1,000,000 bytes?

In most software, 1 MB equals 1,048,576 bytes. Some websites use 1,000,000 bytes. The target-size tool handles both definitions, but you should check the upload site’s specification if the file is near the limit.

Compress a PNG Under 1MB or 500KB

Need to compress a PNG to 1MB or smaller? Combine smart resizing with lossless compression. Many content management systems, forums, and marketplaces enforce megabyte-scale limits, and a PNG that fails upload often needs only a modest trim in dimensions. The target-size tool on compresspng.net gives you presets for 500 KB and 1 MB, so you hit those limits without gutting the colour palette. Here is how to get a PNG under 500kb or down to 1mb while keeping transparency and sharpness intact.

Understanding File Size and Pixel Count

A PNG's size depends on pixel count and image complexity. A 1920 x 1080 image has 2,073,600 pixels. Stored as uncompressed RGBA at 4 bytes per pixel, that works out to about 8.3 MB. Real PNG files compress that data, but large dimensions still produce large files. Screenshots from high-density displays are often twice the pixel size they appear. Halve the dimensions and you cut the pixel count by three quarters. That alone can bring a file down from several megabytes to well under 1 MB.

When you shrink a PNG, find the right balance between dimension cut and quality. For most uploads, resizing to 1920 pixels on the longest edge clears a 1 MB limit without visible loss.

Using the Target-Size Tool Presets

How the presets work

The target-size tool offers two presets: 500 KB and 1 MB. They automate the whole process. The tool applies lossless compression first, then resizes if needed, and finally adjusts encoding to hit the target.

500 KB preset: Pushes the file under 500 kilobytes. Use this for forums or marketplaces with strict limits.
1 MB preset: Shrinks the file to under 1 megabyte. 1 MB is 1,048,576 bytes in most software, though some sites count it as 1,000,000 bytes. The tool handles both.

Both presets preserve transparency. No watermark. The process is automatic.

Resizing to 1920 Pixels

When resizing is enough

Prefer manual control? The Resize PNG tool scales the longest edge to 1920 pixels while keeping aspect ratio and transparency. 1920 pixels is wide enough for most screens and prints, yet small enough to slip under 1 MB for typical photographs and graphics.

For many images, reducing the longest side to 1920 pixels is sufficient. A high-density screenshot that starts at double that width drops to 1920 pixels, slashing the pixel count by most of it. File size falls by a similar proportion, enough to meet a 1 MB limit without touching the colour palette.

Still too large after resizing? Combine the resize with lossless compression. Lossless saves every pixel but trims less fat than palette reduction. It is the safe first step because it changes nothing visible.

Lossless Compression Vs. Palette Reduction

Lossless compression re-encodes the PNG data more efficiently without discarding a single pixel or colour. Expect a saving in many cases. It has limits. For deeper cuts, you may need palette reduction, which drops the number of colours. That saves far more space but can introduce banding or colour shifts.

The target-size tool and Resize PNG tool lean on dimension cuts and lossless compression. They suit files that are too large to upload but do not need heavy colour stripping. Photos saved as PNG are usually far smaller converted to JPG. If you must keep the PNG format, resizing is your best move.

Step-by-Step Shrink a PNG to Under 1 MB

Open the target-size tool and select the 1 MB preset.
Upload your PNG file. The tool applies lossless compression first.
Check the result. Under 1 MB? Done. If not, the tool resizes the longest edge to 1920 pixels automatically.
Download the compressed PNG. No watermark. Transparency stays.

For manual control, use the Resize PNG tool first to scale to 1920 pixels, then apply lossless compression separately. This two-step method puts you in charge of the final dimensions.

When to Choose 500 KB Instead of 1 MB

Some platforms impose a 500 KB limit, especially for profile pictures, thumbnails, or attachments. The 500 KB preset works the same way as the 1 MB preset but targets a tighter final size. Because 500 KB is half of 1 MB, you may need to resize below 1920 pixels, or accept more aggressive compression.

For a PNG under 500kb, the tool determines the best resize and compression settings on its own. You can also manually resize to a smaller dimension, such as a few pixels on the longest edge, before running the preset.

Common Pitfalls and Tips

Check the actual byte count. Some sites count 1 MB as 1,000,000 bytes, while most software counts it as 1,048,576 bytes. The target-size tool handles both, but know which standard the upload site uses.
Do not over-resize. A file only slightly above 1 MB needs a small dimension trim. Shrinking too far makes the image look soft on large screens.
Keep a copy of the original. Lossless compression and resizing are non-destructive, but always save the original in case you need to start over.