Modern smartphones have turned into powerful cameras capable of shooting at tens of megapixels. However, such pictures take up a lot of memory space and are difficult to send via instant messengers without losing quality. Often there is a need to quickly reduce the size of an image directly on the device, without resorting to the help of a computer.
In this article we will analyze in detail how to resize an Android photo on your phoneusing the built-in tools of the system and third-party software. You'll learn the intricacies of working with pixels, bytes, and compression formats. We will look at both manual editing methods and automated solutions for batch processing.
Why do you need to change the resolution of pictures at all
The main reason why users are looking for ways to compress images is to save space. Photos in RAW or maximum JPEG format from modern cameras can weigh from 5 to 20 MB each. For a smartphone with 64 GB of memory, this becomes a problem after a couple of hundred frames.
In addition, many social networks and instant messengers have their own restrictions on the size of downloaded files. For example, sending the original via WhatsApp can take a long time if the Internet is weak. In such cases, the optimal solution is to first reduce the resolution to acceptable values, for example 1920×1080.
There is also a technical aspect: websites and online services often require uploading avatars or documents of a strictly defined size. Uploading a photo 4000 pixels wide to a site where the display is 400 pixels is simply pointless and wastes traffic.
Resizing through the standard Google Photos editor
Most Android devices already have a pre-installed application Google Photos. This is a universal tool that allows you to perform basic cropping, which indirectly affects the file size.
To reduce the physical pixel size of an image, you need to crop excess edges. Open your photo, click the Edit button, and select the crop tool. Choose an aspect ratio, for example 1:1 for a square or 16:9 for a widescreen image.
However, it is worth understanding the difference: cropping removes part of the image, but does not always change the resolution of the remaining part proportionally. If you specifically need to compress a file without trimming the content, it is more difficult to do this using standard system tools.
Before editing the original, create a copy of it. In Google Photos, changes are often saved as new versions, but it is safer to have a backup file.
For precise adjustment to specific requirements (for example, for a visa or document), the built-in editor may not be suitable. In this case, it is better to use specialized utilities, which we will discuss below. But for quickly preparing a photo for sending to Instagram, Google Photos is quite enough.
Using specialized applications for compression
If standard tools do not give the desired result, applications from the Play Market come to the rescue. They allow you to flexibly configure compression parameters, choosing between quality and the final weight of the file.
One of the popular solutions is the application Image Size or Photo & Picture Resizer. Here you can manually enter the desired width and height in pixels. The algorithm will recalculate the image, maintaining the proportions, unless you disable this option.
- 📱 QReduce Lite — allows you to reduce a photo to a specific size in kilobytes, which is convenient for uploading to government services.
- 🖼️ Lit Photo — supports batch processing, you can compress 50 photos at once.
- ⚙️ Photo Compress 2.0 — allows you to choose the percentage of quality (for example, reduce to 70%), which greatly affects the weight.
The process of working in such applications is usually intuitive. You select a photo from the gallery, set target parameters and click the save button. It is important to ensure that the final resolution is not too low, otherwise the photo will look blurry on large screens.
☑️ Selecting an application for compression
⚠️ Attention: When using free versions of applications, intrusive advertising is often encountered. Be careful when pressing buttons so as not to accidentally install third-party junk on your phone.
Manually changing parameters through camera settings
Many users do not know that you can change the size of future photos before they are even taken. This prevents unnecessary giants from filling up your memory. The settings are located directly in the Camera application interface.
Click on the gear icon or swipe towards the settings menu. Find "Resolution" or "Aspect Ratio". Here you will see a list of available options, for example 12 MP, 48 MP or 64 MP.
Selecting a lower resolution, for example 5 MP instead maximum, will significantly reduce the weight of each frame. This is an ideal option for documentary shooting or quick notes, where high detail is not required.
Reducing the resolution in the camera settings is the most effective way to save space, since you do not create unnecessary data, which will then have to be compressed.
It is also worth paying attention to the saving format. Some modern smartphones, such as models from Samsung or Xiaomi, offer the HEICformat. It provides better quality with a smaller file size compared to standard JPEG.
Table of popular resolutions and their purposes
To make it easier for you to navigate the numbers, we have compiled a table with the most common standards. Choosing the correct resolution depends on where exactly the image will be used.
| Resolution (pixels) | Megapixels (MP) | Approximate quality | Where to use |
|---|---|---|---|
| 640 × 480 | 0.3 MP | Low (VGA) | Avatars, thumbnails, icons |
| 1280 × 720 | 0.9 MP | Medium (HD) | Viewing on a smartphone screen, social networks |
| 1920 × 1080 | 2.1 MP | High (Full HD) | Print 10x15, screensaver on PC |
| 3840 × 2160 | 8.3 MP | Very high (4K) | Printing large posters, detailed crop |
As can be seen from the table, resolution 1920 × 1080is sufficient for most tasks on the Internet. Uploading a 50 MP photo to a forum or chat is redundant and creates unnecessary load on servers and the communication channel.
⚠️ Attention: Camera settings interfaces may differ depending on the version of Android and the manufacturer’s shell (MIUI, OneUI, ColorOS). Look for sections with similar names if there is no exact match.
Advanced methods: changing DPI and meta data
Sometimes the task is not to reduce the number of pixels, but to change their density (DPI - dots per inch). This is relevant when preparing files for printing in a printing house or submitting coursework.
The standard value for screens is 72 DPI, and for printing - 300 DPI. This parameter can be changed through advanced editors or special applications for working with EXIF data. In this case, the physical size of the file in bytes may not change much, but the printer will interpret the image differently.
Also worth mentioning (although we use to emphasize the fact): removing EXIF data (geolocation, camera model, date) can reduce the file weight by several kilobytes. For web publications, this is often useful from a privacy perspective.
What is EXIF data?
This is proprietary information written to a photo file. It contains settings for shutter speed, aperture, ISO, as well as GPS coordinates of the shooting location. Removing this data is safe for the image itself.
To change DPI, you may need applications like Photo Exif Editor. You can manually enter the pixel density value in them. Be careful: incorrect values can cause the photo to appear huge or microscopic when printed.
Common mistakes when compressing images
Beginners often make the same mistake: they repeatedly save JPEGs with low quality. Every time you save with lossy compression, the image degrades. Artifacts, “squares” and blur appear.
Try to always work with an original or a high-quality copy. If you need to get several size options, make them all from one source file, and not from an already compressed version.
- 🚫 Ignoring proportions - stretching the picture leads to distortion of faces and objects.
- 📉 Too much compression - the file weighs 10 KB, but nothing is visible on it.
- 💾 Loss of the original —accidental overwriting of the source without the possibility of recovery.
Remember that it is almost impossible to increase the quality of a compressed photo back. Neural networks can help restore details, but this is a complex process that requires separate software. It is better to immediately choose an adequate balance between size and quality.
Use the PNG format for screenshots, diagrams and texts. JPEG is only suitable for photographs with smooth color transitions. PNG will retain clear lines at a smaller size in such cases.
Is it possible to resize a photo without installing applications?
Yes, you can use online services through your phone browser, such as iloveimg or resizeimage.net. Also, some file managers have a built-in feature to change the size when sending a file.
Why does a photo weigh more after compression?
This can happen if you saved the image in an uncompressed format (for example, BMP or uncompressed TIFF) or if the original photo was highly compressed and you saved it as a high-quality JPEG, adding details that were not was.
Which application best preserves quality?
Applications that use Smart Resize algorithms or neural networks (for example, functions in some paid editors) do better. Among the free ones, it has proven itself well Lit Photo in the minimum compression mode.
Does resizing affect the shooting date?
When editors are used correctly, the shooting date (EXIF) is preserved. However, some simple applications can reset the metadata, and the photo will be dated on the day of editing.