Tools/Compress PNG to 40KB

Compress PNG to 40KB

Resize PNG images to 40kB with precision—perfect for optimizing mobile experiences. Maintain clarity while reducing bounce rates. Use Cloudinary to handle thousands of compressions with built-in CDN and automation.

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Free PNG to 40KB Compressor

Generate a compact 40kB image instantly—no installations necessary. Just drag and drop to get a quick-loading PNG without losing key visual data.

Why Choose Our PNG to 40KB Compressor?

Quickly shrink a PNG to 40KB online in seconds, ad-free, with the option for developers to use our API for large-scale compression.

Beyond PNG Compression

Go further than reducing file size. With AI-powered tools like Generative Fill, Object Removal, and Replace, you can seamlessly edit and customize images — unlocking new levels of creativity and flexibility in content creation.

Image Enhancement

From 3D animations and interactive product displays to real-time filtering, Cloudinary’s API offers powerful image enhancement capabilities. Developers can effortlessly refresh older images and make them look stunning again.

Performance Optimization

Images are always delivered in the best quality and format for each user’s device, browser, and connection. Whether it’s JPG, PNG, HEIC, or another format, our system automatically selects the most efficient option for peak performance.

Batch compress PNG images

Effortlessly bulk compress your PNG files to 40KB, or connect our free API to seamlessly auto-optimize every JPG without any extra work!

Workflow Automation

Set up preset configurations to save time and streamline your process. Files are automatically compressed, transformed, and ready for delivery immediately after upload.

Image Formats Versatility

Expand your image workflow with support for next-gen formats like WebP, JXL, and AVIF. These advanced options deliver the perfect balance of quality and efficiency for all your visual assets.

How to compress PNG to 40KB

Quickly reduce your PNGs to exactly 40KB, or join Cloudinary to automate optimization for thousands of images at scale.

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Add your images

Upload or drag and drop your images into the browser

Start Compression

Get started with PNG optimization by compressing your images into smaller, more efficient sizes.

Download compressed images

When compression is finished, download your optimized PNG files, each reduced to under 40KB.

Explore Beyond PNG Compression

A woman and a golden retriever in the mountains. They're sitting, facing away from the camera while the dog noses the woman. They're surrounded by natural splendor including majestic mountains, puffy clouds, and evergreen-studded hills.
An un-cropped image overlaid with a cropping window showing how it would be cropped by Cloudinary.
An arrow pointing from the original asset to the cropped asset
A woman and a golden retriever in the mountains. They're sitting, facing away from the camera while the dog noses the woman. They're surrounded by natural splendor including majestic mountains, puffy clouds, and evergreen-studded hills.
The same asset cropped using the following settings: Aspect Ratio: 1:2. Crop Mode: Content-Aware.
Images
Videos
Crop Mode
Aspect Ratio
Original
18 MB

We’re showing a resized version of the original asset to avoid slow loading speeds. View the original.

The original asset:
JPEG
135 KB
WebP
135 KB
AVIF
90 KB
JPEG XL
94 KB
The image after being optimized using the following settings: Quality: Auto. Width: 1000px.
Original
18 MB

We’re showing a resized version of the original asset to avoid slow loading speeds. View the original.

The original asset:
JPEG
135 KB
WebP
135 KB
AVIF
90 KB
JPEG XL
94 KB
The image after being optimized using the following settings: Quality: Auto. Width: 1000px.
Images
Videos
Quality
Width
An un-cropped image overlaid with a croppingai window showing how it would be cropped by Cloudinary.
An arrow pointing from the original asset to the cropped asset
The same asset cropped using the following settings: Aspect Ratio: 1:1. Crop Mode: Content-Aware.
Images
Videos
Crop Mode
Aspect Ratio
The original image:
An arrow pointing from the original asset to the transformed asset.
The personalized image:
The original image:
The personalized image:
Product Photos
Backgrounds
Overlays
Duration
Full length video: Surfing Trip
An arrow pointing from the original video to the AI-generated preview.
Duration
A shorter video preview generated by Cloudinary's AI using the following settings: Duration: 15 seconds. Max Clips: 9. Min Clip Length: 1 second.
Videos
Duration
Max Clips
Min Clip Length
URL:
/ar_0.5,c_fill,g_auto,w_433/q_auto/f_auto/hiking_dog_mountain.jpg
cloudinary.image("hiking_dog_mountain.jpg", {transformation: [
  {aspect_ratio: "0.5", gravity: "auto", width: 433, crop: "fill"},
  {quality: "auto"},
  {fetch_format: "auto"}
  ]})
new CloudinaryImage("hiking_dog_mountain.jpg")
  .resize(
    fill()
      .width(433)
      .aspectRatio(0.5)
      .gravity(autoGravity())
  )
  .delivery(quality(auto()))
  .delivery(format(auto()));
new CloudinaryImage("hiking_dog_mountain.jpg")
  .resize(
    fill()
      .width(433)
      .aspectRatio(0.5)
      .gravity(autoGravity())
  )
  .delivery(quality(auto()))
  .delivery(format(auto()));
new CloudinaryImage("hiking_dog_mountain.jpg")
  .resize(
    fill()
      .width(433)
      .aspectRatio(0.5)
      .gravity(autoGravity())
  )
  .delivery(quality(auto()))
  .delivery(format(auto()));
new CloudinaryImage("hiking_dog_mountain.jpg")
  .resize(
    fill()
      .width(433)
      .aspectRatio(0.5)
      .gravity(autoGravity())
  )
  .delivery(quality(auto()))
  .delivery(format(auto()));
CloudinaryImage("hiking_dog_mountain.jpg").image(transformation=[
  {'aspect_ratio': "0.5", 'gravity': "auto", 'width': 433, 'crop': "fill"},
  {'quality': "auto"},
  {'fetch_format': "auto"}
  ])
(new ImageTag('hiking_dog_mountain.jpg'))
	->resize(Resize::fill()->width(433)
->aspectRatio(0.5)
	->gravity(
	Gravity::autoGravity())
	)
	->delivery(Delivery::quality(
	Quality::auto()))
	->delivery(Delivery::format(
	Format::auto()));
cloudinary.url().transformation(new Transformation()
  .aspectRatio("0.5").gravity("auto").width(433).crop("fill").chain()
  .quality("auto").chain()
  .fetchFormat("auto")).imageTag("hiking_dog_mountain.jpg");
cl_image_tag("hiking_dog_mountain.jpg", transformation: [
  {aspect_ratio: "0.5", gravity: "auto", width: 433, crop: "fill"},
  {quality: "auto"},
  {fetch_format: "auto"}
  ])
cloudinary.Api.UrlImgUp.Transform(new Transformation()
  .AspectRatio("0.5").Gravity("auto").Width(433).Crop("fill").Chain()
  .Quality("auto").Chain()
  .FetchFormat("auto")).BuildImageTag("hiking_dog_mountain.jpg")
cloudinary.image('hiking_dog_mountain.jpg').transformation(Transformation()
	.resize(Resize.fill().width(433)
.aspectRatio(0.5)
	.gravity(
	Gravity.autoGravity())
	)
	.delivery(Delivery.quality(
	Quality.auto()))
	.delivery(Delivery.format(
	Format.auto())));
imageView.cldSetImage(cloudinary.createUrl().setTransformation(CLDTransformation()
  .setAspectRatio("0.5").setGravity("auto").setWidth(433).setCrop("fill").chain()
  .setQuality("auto").chain()
  .setFetchFormat("auto")).generate("hiking_dog_mountain.jpg")!, cloudinary: cloudinary)
MediaManager.get().url().transformation(new Transformation()
  .aspectRatio("0.5").gravity("auto").width(433).crop("fill").chain()
  .quality("auto").chain()
  .fetchFormat("auto")).generate("hiking_dog_mountain.jpg");
cloudinary.image('hiking_dog_mountain.jpg').transformation(Transformation()
	.resize(Resize.fill().width(433)
.aspectRatio(0.5)
	.gravity(
	Gravity.autoGravity())
	)
	.delivery(Delivery.quality(
	Quality.auto()))
	.delivery(Delivery.format(
	Format.auto())));
cloudinary.image {
	publicId("hiking_dog_mountain.jpg")
	 resize(Resize.fill() { width(433)
 aspectRatio(0.5F)
	 gravity(
	Gravity.autoGravity())
	 })
	 delivery(Delivery.quality(
	Quality.auto()))
	 delivery(Delivery.format(
	Format.auto())) 
}.generate()
new CloudinaryImage("hiking_dog_mountain.jpg")
  .resize(
    fill()
      .width(433)
      .aspectRatio(0.5)
      .gravity(autoGravity())
  )
  .delivery(quality(auto()))
  .delivery(format(auto()));
GET STARTED
GET STARTED
GET STARTED
GET STARTED

Frequently Asked Questions

Get Answers to Your Questions About Our Chat Software and Features

Cloudinary’s Compress png to 40KB utility compresses JPG, PNG, HEIC, and other formats down to 40KB or less without losing quality. Upload or drag your image and compression kicks off immediately. By combining f_auto (AVIF/WebP) and q_auto your visuals maintain high fidelity with smaller file sizes. Perfect for mobile apps and image-rich websites aiming to improve performance and user experience.

Yes, Cloudinary’s robust API enables full control over Compress png to 40KB processing. API-based uploads can include q_auto:low, f_auto, and fl_lossy settings to shrink files automatically. You can also configure constraints or chain transformations to ensure each asset meets the size goal, ideal for bulk handling or UGC.

To achieve 40KB, we use perceptual optimization that is visually lossless and content-aware. The resulting quality change is very small and usually not detectable at normal viewing sizes, since edges, textures, and critical detail are preserved while redundant data is removed. Lossless encoding often passes 40KB; when bit-exact output is required, use PNG or lossless AVIF/WebP and allow for larger files. For most photographic and marketing imagery, perceptual settings deliver a compact asset with virtually no visible shift. If artifacts show up, raise quality a little or scale dimensions down slightly to remain close to 40KB while keeping the appearance clean.