How to change the size of a video on an Android phone: from cropping to compression without loss of quality

Resizing a video on Android is a task faced by both beginners and experienced users. Someone wants to reduce the weight of the video for sending to the messenger, someone needs to trim off the black margins at the edges, and others are trying to adapt the video to the Reels or TikTokformat. Unlike iOS, where editing options are limited, Android offers dozens of methods - from built-in tools to specialized applications with support 4K and HDR.

The main problem is that not all methods are equally effective. Some apps compress video into an unintelligible mess, others maintain quality but require payment, and others do not work at all on older versions of Android. In this guide, we will examine 5 proven methods resize videos, compare them in terms of speed, quality and convenience, and also tell you how to avoid common mistakes - from distortion of proportions to loss of sound.

1. Built-in Android tools: when you don’t need to install anything

Modern smartphones on Android 10+ (including models Samsung Galaxy, Xiaomi Redmi, Google Pixel) have built-in video editors that allow you to trim a frame, change the resolution and even compress files without third-party applications. The main advantage is that you don’t need to download anything extra, but the disadvantage is limited functionality.

To change the video size through the standard application Gallery or Google Photos:

• 📱 Open the video in Gallery and click “Edit” (pencil icon).
• 🔍 Select the “Crop” tool (Crop) - a grid with markers in the corners will appear.
• ✂️ Drag the handles to define new frame boundaries. For fixed proportions (for example, 1:1 for Instagram) use preliminary templates.
• 💾 Save changes - the system will offer to replace the original or create a copy.

Important: built-in editors do not change the video resolution (for example, with 1920×1080 on 1280×720), but only crop the frame. To compress or change resolutions, you will need third-party applications.

2. Applications for cropping and changing video proportions

If the built-in tools are not enough, specialized applications come to the rescue. They allow you not only to trim the video, but also to change its orientation, add a background (for example, for vertical videos in horizontal format), and also adjust the proportions for specific platforms.

Top 3 applications for cropping videos on Android:

Application	Features	Cons	Cost
CapCut	Templates for TikTok/Reels, support 4K, "Smart cropping" tool	Advertising in the free version, requires registration	Free (premium from 299 ₽/month)
InShot	Simple interface, cropping while maintaining quality, adding a background	Watermark in the free version, limit on video length	Free (Pro from 199 ₽/month)
KineMaster	Multi-layer editing, support 60 FPS, export to 1080p	Difficult for beginners, watermark without subscription	Free (premium from 399 ₽/month)

Example of trimming a video in CapCut:

1. Import the video into the project.
2. Click on the clip in the timeline and select “Crop” (Crop).
3. Set the proportions manually or select a template (for example, 9:16 for stories).
4. Apply the changes and export the video with quality settings.

Use the original file (not compressed by messenger)

Check the video orientation (landscape/portrait)

Save a copy of the original in case of an error

Select an application that supports the original resolution-->

3. Changing video resolution: compression without loss of quality

If the goal is to reduce size. file (for example, to send the video by mail or upload to the cloud), you need to change the resolution or bitrate. It is important to understand the difference here:

• 📉 Reducing resolution (from 1080p to 720p) - reduces detail, but greatly reduces weight.
• 🔄 Compression while preserving resolution - reduces the bitrate, the quality drops less, but the file becomes heavier than with a decrease resolution.

For these tasks the following are suitable:

• 🎬 Video Compressor — simple interface, support 4K, bitrate adjustment.
• 📦 Resize Video — specializes in changing resolution, shows preliminary result.
• 🔧 FFmpeg (for advanced) - a console utility with maximum flexibility.

Example command for FFmpeg (requires Termux or root access):

ffmpeg -i input.mp4 -vf scale=1280:720 -c:a copy output.mp4

This command reduces the resolution up to 720p without audio re-encoding.

4. How to change the video size for social networks

Each platform has its own video requirements:

• 📱 Instagram Reels: 1080×1920 (9:16), maximum 90 seconds.
• 🎵 TikTok: 1080×1920 or 1920×1080, bitrate up to 8 Mbit/s.
• 📺 YouTube Shorts: 1080×1920, duration up to 60 seconds.
• 💼 LinkedIn: 1280×720 or 1920×1080, maximum 10 minutes.

To adapt the video to these formats:

1. Use CapCut or InShot —they have templates for social networks.
2. If the video is horizontal, but you need a vertical orientation, add a blurred background or colored fields on the sides.
3. For YouTube avoid strong compression - the platform re-encodes the video, which can degrade the quality.

What happens if you upload the video the wrong format?

Social networks will automatically crop or stretch the video, which will lead to distorted proportions. For example, horizontal video in Instagram Reels will be cut off on the sides, and vertical video in YouTube is shown with black margins.

5. Advanced methods: resizing via PC and cloud services

If your phone does not have enough power or you need professional tools, you can transfer the video to a computer or use cloud services. This method is suitable for processing large files (for example, video from GoPro or DJI Osmo).

Options:

• 🖥️ Adobe Premiere Rush — a cross-platform application that synchronizes projects between your phone and PC.
• ☁️ Clideo or Online-Convert —cloud editors that work directly in the browser.
• 🐧 HandBrake —a free app for PC with fine-tuning codecs.

Example of work c HandBrake:

1. Connect your phone to the PC and copy the video.
2. Open the file in HandBrake, select a preset (for example, Fast 1080p30).
3. Tab Dimensions — set a new resolution or enable the “Keep aspect” option ratio."
4. Click Start Encode and wait for completion.

6. avoid

Even experienced users make mistakes when resizing a video. Here are the most common ones:

⚠️ Attention: If the video turns out “stretched” after trimming, it means that the proportions have been violated. Always use the “Keep aspect ratio” option (Lock Aspect Ratio) in the editor.

Error 1: Loss of quality during compression. Many applications set the bitrate to low by default. Before exporting, check the quality settings - the optimal bitrate for 1080p video: 8–12 Mbit/s.

Error 2: The sound disappeared after conversion. This happens if the application does not support the audio codec of the source file. Solution: use apps with the “Copy sound” option (Copy Audio), for example HandBrake.

Error 3: The video became “torn” after changing the resolution. Reason - frame rate mismatch (FPS). If the original video is 60 FPS, and you export to 30 FPS, the movements will not be smooth. Always save the original FPS.

7. Comparison of methods: what to choose for your task

The choice of method depends on the goal:

Task	Best method	Approximate time	Loss of quality
Crop black fields	Built-in editor or CapCut	1–2 minutes	No
Reduce weight for sending	Video Compressor or FFmpeg	3–5 minutes	Minimum
Adapt to TikTok/Reels	InShot or CapCut (templates)	2–3 minutes	No
Change resolution from 4K to 1080p	HandBrake (PC) or Resize Video	5-10 minutes	Moderate

Critical: if the video was shot in HDR format (for example, Samsung Galaxy S23 or Google Pixel 7), most mobile editors will not preserve high dynamic range. To work with HDR, use Adobe Premiere Rush or Final Cut Pro (on Mac).

Frequently asked questions (FAQ)

Is it possible to resize a video without losing quality?

Technically impossible increase resolution without loss of quality (this is called upscaling). However, a decrease in resolution (for example, from 4K to 1080p) with the right settings can be almost imperceptible. Use high bitrate (from 10 Mbit/s to 1080p) and codecs H.264 or H.265.

Why after trimming has the video become “pixelated”?

This happens if the original video was already low resolution, and you are trying to reduce it even further. For example, cropping a video to a square will lead to noticeable pixelation. Solution: use the highest quality sources or add a blurred background instead of cropping. 720p-video to square 600×600 will lead to noticeable pixelation. Solution: Use the highest quality sources or add a blurred background instead of cropping.

Which application is better for beginners?

For first experiments, we recommend InShot —it has an intuitive interface, Russian-language support and free templates for social networks. If you only need to compress the video, try Video Compressor (no watermark in the free version).

Is it possible to resize a video on VLC on Android?

VLC Android does not support video editing - only playback. To change the size, use specialized applications from this article.

How to return the original video if you saved the changes?

If you replaced the original when saving, you can only restore it from a backup copy (for example, from Google Photos or cloud storage). Always save a copy before editing! Some applications (for example CapCut) have an option to “Undo changes” within 24 hours.