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Free Up Gigabytes of Phone Storage and Keep Every Moment With You

Reduce the size of your photos and videos to free up space on your phone for more. Handle your files locally on your Windows PC without cloud services or monthly fees.

  • Works entirely on your PC - your files never leave your devices

  • Simple and clear interface - you don't have to be a tech expert

  • No cloud services, no subscriptions

Beta Offer: PhoneSlim v0 Beta is free for everyone!


in a nutshell

See how it works in
60 seconds

Discover PhoneSlim

how phoneslim works

Slim Down Your Phone in
3 Simple Steps

STEP 1

Copy your photos and videos to your Windows PC.
We recommend keeping your original files safely stored on your PC or other device as a high-quality backup.


STEP 2

Download and run PhoneSlim on your Windows PC. It's simple to use.

STEP 3

Replace the original photos and videos on your phone with the slimmed-down versions and enjoy your newly freed storage.




is phoneslim right for you?

Do you want to keep more photos and videos stored directly on your phone?

Own your moments



Save storage on your phone without burning your budget

Stop the "Storage Full" pop-ups on your phone. Avoid the cost of expensive phone upgrades or monthly cloud subscriptions.
Modern smartphones record at very high quality to ensure the footage can be edited, zoomed, or color-corrected later. For simple viewing on your phone, this quality is often much higher than you need. PhoneSlim lets you select the exact quality that matches your needs to save massive amounts of storage.


We respect your privacy: your files are for your eyes only

Keep your photos and videos safely on your personal devices. No cloud service is required, and PhoneSlim never accesses or uploads your personal files.


Make your photos and videos compatible and correctly displayed on your phone

PhoneSlim automatically converts older photo and video formats into modern, universally compatible types so you can easily enjoy them on your phone. During processing, file creation dates and GPS location data are carefully preserved and corrected, ensuring all your memories are displayed in the exact right order in your phone's gallery. Learn more about how PhoneSlim can improve your phone gallery here.


Why you Can Trust PhoneSlim


our phoneslim versions

Download PhoneSlim

Download the PhoneSlim app first and then get a free license to unlock the FULL version for free

Download
PhoneSlim for Windows

v0 Beta

Free

Try our Beta version and process folders of up to 3GB at a time.


Click here if you experience problems with your download

Get a free license for
PhoneSlim Full

 v0 Beta

Free

Use discount code TRYBETAFULL at checkout to unlock the full Beta version of PhoneSlim — completely free, with no size limits.

The free Beta Full license is available for a limited time during Beta.

Send us your feedback and receive a free PhoneSlim v1 FULL license key.


Learn more about how PhoneSlim can improve your phone gallery

PhoneSlim can help you make your photos and videos compatible and correctly displayed on your phone

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Improve your phone gallery


Enjoy old videos from your digital camera on your modern phone

Video and image formats that were common a few years ago are often unreadable on modern smartphones. PhoneSlim automatically converts older AVI, MKV, MPG, 3GP, WebM, WMV, and M4V video files into modern MP4 or MOV formats so you can finally watch them on your phone. It will also automatically convert PNG, BMP, WebP, and TIFF image files into the universally supported JPG format.


Make sure your photos and videos appear in the correct order

Photos and videos downloaded or shared through social media are usually stripped of their "Create Date" metadata. This is the exact data most smartphones rely on to display your files in chronological order. PhoneSlim automatically intelligently extracts and adds the missing metadata during processing, ensuring your memories are finally displayed correctly in your phone's gallery.


Make your video GPS data readable across more devices

Android devices (like Samsung, Pixel, or Xiaomi phones) read video GPS metadata differently than iPhones. If you have ever switched from an iPhone to an Android device, you may have noticed that your video files suddenly lost their location data. When processing a video file, PhoneSlim duplicates and formats the GPS metadata so it can be easily read by both iPhone and Android devices.
Note: Because metadata reading can still be temperamental depending on your specific device's gallery app, we recommend trying the Free version of PhoneSlim first to ensure the converted files work perfectly for you.


Learn more about PhoneSlim for Windows

PhoneSlim is a desktop application designed for Windows 10 and Windows 11 that can batch-process photos and videos across multiple folders at once. The interface is simple and clear - you don't have to be a tech expert to use it.

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PhoneSlim for Windows

This is how PhoneSlim will look on your Windows PC

The Welcome Screen

  • The Welcome screen is the first window you will see when you run PhoneSlim on a Windows PC.

  • PhoneSlim is a Windows utility-style app, guiding you step-by-step through a series of pop-up windows.

  • Make sure you have copied all the photos and videos you want to process to your Windows PC (or any connected external drive) before you click Start.

Step 1: Select Input Folders

  • Multiple folders can be selected and processed at the same time.

  • These folders can contain a mix of photos, videos, and their own subfolders.

  • Your original files in the input folders are completely safe and will not be altered.

  • PhoneSlim will scan your input folders for incompatible or duplicate files, and helpful pop-up windows will guide you through resolving them.

Step 2: Select your SlimFolder

  • Select a single destination folder where your processed files will be saved.

  • PhoneSlim calls this your "SlimFolder".

  • The folder structure of your input folders will be perfectly maintained in your SlimFolder. This ensures you will find your output files exactly where you expect them to be.

Step 3: Resize Targets and Formats

  • Select your preferred size for your processed photos and videos.

  • PhoneSlim recommends 1080px (HD+) for photos and 720p (HD) for videos for viewing on a smartphone. However, several options are available so you can choose the quality that works best for you.

  • All image files are converted to the universally compatible JPG format. You can set the format of your video files to either MP4 or MOV. These are standard formats fully compatible with modern smartphones, so there is no need to overthink it.

  • The size of your processed files is estimated at this stage. Keep in mind that this is just a rough estimate; the actual size will vary based on the original quality of your files.

The Processing Screen

  • Check the progress and estimated time left at the bottom of the window.

  • PhoneSlim’s DateFix pop-up windows will appear to help you add missing "Create date" metadata to your files if needed. Click here to learn why some of your files may be missing a "Create date".

  • The total duration of the process will depend on the size of the original files you are processing and the power of your PC.

  • Photo and video encoding is very resource-demanding and can take several hours to complete. We recommend letting your PC run overnight so PhoneSlim can do the heavy lifting while you rest.


Do you need more details?

Get answers to Frequently Asked Questions
and learn about the external tools PhoneSlim uses

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FAQ & external tools

Frequently Asked Questions

1. What is PhoneSlim?
PhoneSlim is a Windows desktop application that can batch-process photos and videos to drastically reduce their file size. It has been designed specifically for phone galleries. It helps you free up storage space on your phone while maintaining—or even improving—how your files are organized and displayed in your gallery.
2. Can I install PhoneSlim on my smartphone?
No. PhoneSlim is a robust desktop tool and can currently only be installed on Windows 10 and Windows 11 computers. Once you process your files on your computer, you can simply transfer them back to your phone.
3. Can PhoneSlim help me save storage on my iPhone or Android device?
Yes! PhoneSlim is perfectly suited for both Apple iPhones and Android devices (like Samsung, Pixel, and Xiaomi). PhoneSlim deliberately converts your media into universally recognized formats—JPG for photos, and MP4 or MOV for videos. Virtually every smartphone manufactured in the last 15 years fully supports these standard formats, meaning your newly slimmed files will be readable on your phone regardless of the device you use.
4. Will PhoneSlim work on my computer? Are there any minimum system requirements?
PhoneSlim has been designed to work on all 64-bit Windows 10 and Windows 11 computers. The minimum supported screen resolutions are 1024×768 and 1280×720. Please install and try the Free version to ensure it works as expected on your hardware before purchasing.
5. Can I use PhoneSlim to save storage on my tablet?
Yes, absolutely! However, please keep in mind that PhoneSlim's default recommended sizes in Step 3 (1080px for photos and 720p for videos) are optimized specifically for smartphone screen sizes. Because tablets have much larger displays, you may want to select higher quality settings (such as 1440px or 900p) to ensure your media still looks sharp. We recommend testing the Free version of PhoneSlim first to find the perfect balance between saving storage space and maintaining visual quality on your specific tablet.
6. Some of the processed files in my SlimFolder do not have the size I selected. Why?
PhoneSlim aims to reduce the size of your files to save phone storage. If the target size you selected is larger than the original file, PhoneSlim intelligently skips upscaling and retains the original size. For example, if you set the output size to 1080px, but one of your original photos is only 720px, PhoneSlim will keep that specific photo at 720px.
7. What is DateFix?
DateFix is a built-in feature PhoneSlim uses to add missing "Create Date" metadata to your files. "DateFix Auto" automatically calculates and injects this date by analyzing the file's name or its parent folder's name. If it cannot find a date automatically, "DateFix Manual" allows you to manually input a creation date for the file before processing finishes.
8. How does DateFix work? Give me more details.
If a file missing its "Create Date" metadata is identified, a pop-up window will inform you and offer to run DateFix Auto. Files missing metadata are typically media downloaded from social apps (e.g., Messenger, WhatsApp). These apps usually embed the date the file was shared directly into the filename (e.g., "IMG-20241020-WA0005.jpg").

DateFix Auto first attempts to extract a valid date from the filename. If the filename doesn't contain a recognizable date format (e.g., 20241020, 2026-04-26, etc.), it will scan the parent folder's name (e.g., "20260426 London"). When scanning folder names, DateFix Auto can even detect partial dates where only the year and month are provided (e.g., "2025-12 Christmas in New York"). In partial cases, the date is set to the first day of that month (e.g., 2025-12-01).

If DateFix Auto still cannot find a valid date, the file is temporarily flagged, and DateFix Manual will prompt you to type in a valid date at the end of the processing run. The timestamp assigned to any file treated with DateFix is always safely set to 12:00 PM (midday).
9. Can I run DateFix or fix my video GPS data without reducing the size of my original files?
Yes! If your original files are already in JPG, MP4, or MOV formats, you can use PhoneSlim purely as a metadata repair tool. At Step 3, simply set the selected image and video sizes to "as original" and the video format to "Mixed". PhoneSlim will copy your files to the SlimFolder without compressing them, and then apply its metadata repairs—this includes injecting missing "Create Date" data (DateFix) and optimizing your video GPS data to be readable across both iPhone and Android devices.
10. Some of the converted files in my SlimFolder are larger in size than the originals. Why?
When the selected output video size/resolution is greater than the size of the original file (e.g. you have selected a target resolution of 1080p but the original file is only 600p) or when the output video size is set to "as original" but a format conversion is still required (e.g. changing an older AVI file into a modern MP4), PhoneSlim must re-encode the file. To preserve your original quality, PhoneSlim matches the bitrate of the new file to the old one. Depending on the complexity of the video, this can occasionally result in an output file that is slightly larger than the original.
11. Can PhoneSlim process Ultra HDR image files?
The current version of PhoneSlim can process Ultra HDR files, but it cannot retain their specialized "gain map" metadata during the conversion process. This may result in the output photo displaying with different brightness levels than the original. We recommend testing the Free version of PhoneSlim first to confirm you are satisfied with how your Ultra HDR files look after conversion.
12. How can I check if all my files were processed successfully?
A summary of the PhoneSlim processing log is displayed on your screen immediately after processing finishes. Additionally, an extended text file containing highly detailed information and processing stats is automatically saved inside your new SlimFolder. Look for the file named PhoneSlim_log_YYYYMMDD_HHMMSS.txt.
13. My computer (or PhoneSlim) crashed during processing. What can I do?
A background crash log (named PhoneSlim_Debug_YYYYMMDD.log) is automatically generated and saved in your local Windows AppData folder. You can find this by typing %LOCALAPPDATA%\PhoneSlim into your Windows File Explorer path bar (e.g., C:\Users\YourUsername\AppData\Local\PhoneSlim\).

Because PhoneSlim intelligently skips files that have already been processed, you can simply open the app and restart the process from where it crashed. If the problem persists or if there are explicit error messages in your debug log, please send the log file to PhoneSlim Support for assistance.
14. Can I transfer my PhoneSlim FULL license to a new computer?
Yes, you can transfer your existing license to another computer. If you still have access to your old computer, open PhoneSlim and deactivate your license there. You can then activate PhoneSlim on your new computer using the same license key. If you no longer have access to your old computer, please contact our support team for assistance.

PhoneSlim is intended for personal use only. We reserve the right to cancel your license if it is shared with others.

External Tools

FFmpeg
FFmpeg is used to decode and encode video files. A lightweight LGPL version of FFmpeg is bundled with PhoneSlim. The native Windows 10/11 hardware encoder is utilized for video processing.
Learn more about FFmpeg and download other versions here:
https://ffmpeg.org/

Exiftool
PhoneSlim uses ExifTool to read, edit, and transfer metadata across video and image files. The advanced DateFix Auto and DateFix Manual features rely heavily on ExifTool's capabilities. Learn more about Exiftool here:
https://exiftool.org/

PhoneSlim also uses the following third-party components: customtkinter, darkdetect, packaging, pillow, certifi, charset-normalizer, idna, requests, and urllib3.
All respective licenses are included with the application and can be viewed in the installation folder.



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Contact PhoneSlim


We would love to hear your feedback!


About the creator

Hello,I’m Garry, the creator of PhoneSlim.PhoneSlim started as a personal project. I’m the father of two wonderful kids, and like many parents my phone quickly filled up with photos and videos of everyday moments I never want to lose. At the same time, I also wanted to keep older memories with me: photos from trips, friends, and important moments from earlier years.I keep my full photo and video collection organised on my PC, but I always wished I could carry more of those memories on my phone without running out of storage. Cloud services didn’t feel like the right solution for me as they can be expensive, and browsing photos in the cloud never feels quite the same as scrolling through your phone’s own gallery.So I decided to build a solution for myself.PhoneSlim was created to make it easy to keep more photos and videos directly on your phone while preserving your privacy and avoiding cloud subscriptions. It simply helps you keep more of what matters with you.I hope PhoneSlim helps youOwn your Moments !


Address

PhoneSlim Ltd.
128 City Road,
EC1V 2NX,
London, UK
[email protected]


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End User License Agreement (EULA)


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Your Feedback

Takes approximately 30 seconds.
Your feedback directly shapes upcoming features.

Beta Offer: Get a free PhoneSlim FULL license for the official v1 release when you try the app and send us your feedback.

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Beta Offer: How to Get Your Free PhoneSlim FULL License Key1. Download and try PhoneSlim Beta. You can even try PhoneSlim Beta FULL for free.
2. Complete the feedback form and submit it. Make sure to include your email address.
3. You’ll receive a 100% discount code by email within 48 hours, along with instructions to claim your license key for the v1 release.


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PhoneSlim BETA

Early access version
Safe to install and ready to use

  • Safe to install

  • No signup required

  • No hidden installs or bloatware

This Beta version is provided for early testing and feedback.
Security warnings will disappear as the application gains verification and download history.

What you need to know about the BETA version

Because this is a new Beta release, your system may show standard security notices. This is normal and safe. See below for help on some known issues.

1. Microsoft Edge download warning
If you use Microsoft Edge you may receive this warning when the file downloads:
“PhoneSlim_Setup.exe isn't commonly downloaded”.
This is because the app is new and doesn’t yet have a download history.
What to do:
- Hover over the download warning
- Click the three dots (⋯) on the right
- Click “Keep”
- In the next prompt, click “Keep anyway”

2. Windows security message (during installation)
When you open PhoneSlim_Setup.exe to install it, Windows may display a security message. This is a standard check for new apps.
What to do:
- Click “More info”
- Then click “Run anyway”


Please press here to contact us for any other problems and get help.

Your safety matters

PhoneSlim is built using trusted, industry-standard tools and tested before every release.

  • No background processes or hidden activity

  • No data uploaded without your permission

  • Clean uninstall at any time

Ready to try PhoneSlim?

PhoneSlim_Setup_v0.2.0.exe
Early users help shape the final version
Send us your feedback here


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