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Why LMPB Tools?
Simple, private tools that just work — right in your browser.
- Private Everything runs in your browser. Files are never uploaded.
- No login required No account, no sign-up, no email. Just open a tool and use it.
- Fast No upload or download wait — results appear instantly.
- Free All tools are free to use, with no limits.
- Works everywhere Phone, tablet or computer, in any modern browser.
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Frequently asked questions
Are my files or text uploaded anywhere?
No. Every tool runs inside your browser on your own device. Nothing you enter or open is sent to a server.
Do I need to create an account or log in?
No login is required. There are no accounts — open any tool and start using it straight away.
Are the tools really free?
Yes. All tools are free, with no limits or watermarks. The site is supported by ads.
Does it work on my phone?
Yes. The tools work in any modern browser on phones, tablets and computers.
Can I use the tools offline?
Once a tool has loaded it does its work on your device, so it keeps working even if your connection drops.
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Image Resizer
Resize JPG, PNG and WebP images by pixels, percent or print size — keep the aspect ratio, crop to fill, or pad. Social media presets. Batch, private.
Change the size of photos and images in a few clicks: set exact pixels, a percentage, the longest side, or a print size in centimetres or inches. Keep the proportions, crop to fill an exact shape such as a square Instagram post, or add a border to fit without cropping.
Resizing uses high-quality Lanczos resampling, so downsized images stay sharp. Process one image or a whole folder, then download them individually or as a ZIP — everything runs in your browser, nothing is uploaded.
How to use Image Resizer
- Click “Choose images”, drop images onto the page, or paste one with Ctrl+V.
- Pick how to resize: Pixels, Percent, Longest side or Print size — or choose a preset such as Instagram 1080 × 1080.
- If you set both width and height, choose Fit inside, Fill & crop, Pad to size or Stretch.
- Choose the output format and quality, then download each image or all of them as a ZIP.
Features
- Resize by exact pixels, percentage, longest side or print size (cm / inches at any DPI).
- Keep the aspect ratio automatically, or stretch to an exact size.
- Fill & crop to an exact shape (centre crop), or pad with a colour or transparency.
- Presets for Instagram, Stories, Facebook, X, LinkedIn, YouTube, Full HD and passport photos.
- High-quality Lanczos resampling for sharp results.
- Save as the same format, JPG, PNG or WebP, with a quality setting.
- Batch resizing with ZIP download; phone photos are turned upright automatically.
- Free, private and works offline once loaded.
Social media image sizes
Recommended sizes in pixels. Choose a preset and the image is cropped to fill the exact shape.
| Where | Size (px) | Shape |
|---|---|---|
| Instagram post (square) | 1080 × 1080 | 1:1 |
| Instagram portrait post | 1080 × 1350 | 4:5 |
| Instagram / Facebook Story, Reels, TikTok | 1080 × 1920 | 9:16 |
| Facebook link / shared image | 1200 × 630 | 1.91:1 |
| X (Twitter) post image | 1600 × 900 | 16:9 |
| X (Twitter) header | 1500 × 500 | 3:1 |
| LinkedIn banner | 1584 × 396 | 4:1 |
| YouTube thumbnail | 1280 × 720 | 16:9 |
Pixels, DPI and print size
Digital images are measured in pixels. DPI (dots per inch) only matters when printing: it says how many pixels go into each inch of paper. For sharp photo prints use 300 DPI, so a 10 × 15 cm (4 × 6 in) print needs about 1181 × 1772 pixels; for posters seen from a distance, 150 DPI is usually enough. Choose “Print size”, enter the paper size and DPI, and the tool calculates the pixels for you.
| Print size | Pixels at 300 DPI |
|---|---|
| 10 × 15 cm (4 × 6 in) | 1181 × 1772 (1200 × 1800) |
| 13 × 18 cm (5 × 7 in) | 1535 × 2126 (1500 × 2100) |
| A4 (21 × 29.7 cm) | 2480 × 3508 |
| US Letter (8.5 × 11 in) | 2550 × 3300 |
| Passport photo (2 × 2 in) | 600 × 600 |
Fit inside, fill & crop, pad or stretch?
When you set both a width and a height that have a different shape from your image, choose what should happen. Fit inside keeps the whole image and makes it as large as possible within the box, so one side may be smaller. Fill & crop fills the whole box and cuts off the edges — best for thumbnails and social posts. Pad to size keeps the whole image and fills the empty space with a colour or transparency. Stretch forces the exact size and distorts the image, which is rarely what you want.
Resize without losing quality
Making an image smaller always removes pixels, but good resampling keeps it sharp: this tool uses Lanczos filtering, the same high-quality method used by professional editors. Enlarging an image cannot add real detail, so “Don't enlarge small images” is on by default. Resize before compressing, and keep your original file in case you need a different size later.
Frequently asked questions
Is the image resizer free and private?
Yes. It is free with no limits, and your images are resized in your browser — nothing is uploaded.
How do I resize an image without stretching it?
Keep “Keep aspect ratio” ticked and enter only the width or only the height. If you need an exact width and height, choose Fill & crop or Pad to size instead of Stretch.
How do I make a photo 1080 × 1080 for Instagram?
Choose the “Instagram post 1080 × 1080” preset. The photo is resized and cropped from the centre to a square.
Can I resize many images at once?
Yes. Add as many images as you like; they are all resized with the same settings and can be downloaded as one ZIP file.
Does resizing reduce the file size?
Making an image smaller in pixels also makes the file much smaller. For the smallest files, save as WebP or use the Image Compressor afterwards.
What does DPI mean for my image?
DPI only affects printing. A file's pixel size decides its quality; the DPI just tells the printer how large to print it. Use Print size to get the right pixels for a print.
Why is my phone photo turned the right way now?
Phones save photos with an orientation note instead of rotating the pixels. The resizer applies that note, so the result is upright everywhere.