Free Image Resizer: Custom Sizes Like 16×16 with No Server Upload — ToolMars Blog

Q: Is this image resizer free?

Yes. The ToolMars image resizer is completely free with no usage limits, no signup, and no paywall.

Q: Does the image resizer upload my files to a server?

No. There is no server upload. All resizing happens locally in your browser, so your images never leave your device.

Q: Can I resize an image to 16×16?

Yes. Enter 16 for width and height, or use the 16×16 preset. Then export as PNG or ICO for favicons and small icons.

Q: Which export formats are supported?

PNG, JPEG, WebP, and ICO (PNG-based), plus an option to keep the original format when possible.

Q: Can I resize multiple images at once?

Yes. Add a batch of images, set your target dimensions once, resize all, and download individually or as a ZIP.

Favicons, app icons, Open Graph cards, and product thumbnails all need exact pixel sizes. A free image resizer with no server upload lets you set any custom dimensions — including 16×16 — without sending private photos to someone else's cloud.

This guide explains when custom sizing matters, how fit modes work, which formats to export, and how to use the ToolMars free image resizer safely in your browser.

Resize images free — no server upload

Custom sizes like 16×16, batch export as PNG, JPEG, WebP, or ICO. 100% private in your browser.

Open Free Image Resizer

Why Resize Images to Exact Dimensions?

Stretching an image in CSS can blur or crop it unpredictably. Platforms expect fixed sizes:

16×16 / 32×32: Classic favicon and tab icons
180×180 / 512×512: Apple touch icons and PWA icons
1200×630: Common Open Graph / social preview size
1920×1080: Full HD banners and video thumbnails

With a free online tool that does no server upload, you can hit those sizes without installing Photoshop or risking confidential screenshots on a third-party uploader.

How to Resize an Image (Step by Step)

Using the free ToolMars resizer

Open the free image resizer — no account and no server upload.
Drop one or more images into the workspace.
Enter a custom width and height (for example 16×16) or pick a preset.
Choose fit mode and export format (PNG, JPEG, WebP, or ICO).
Click Resize, then download files individually or as a free ZIP.

Stretch vs Contain vs Cover

Stretch: Forces the exact size. May distort if the aspect ratio changes.
Contain: Fits the whole image inside the box without cropping (may leave empty margins).
Cover: Fills the box and crops edges — great for square avatars and social cards.

Which Format Should You Export?

PNG: Logos, icons, and graphics that need sharp edges or transparency
JPEG: Photos when file size matters more than perfect sharpness
WebP: Modern web delivery — often smaller than JPEG/PNG
ICO: Favicon-style downloads (PNG-based) for small site icons

Privacy tip: Many “free” online resizers upload your files to a remote server. ToolMars does no server upload — processing stays on your device, which is safer for client work, screenshots, and personal photos.

Resize images free — no server upload

Custom sizes like 16×16, batch export as PNG, JPEG, WebP, or ICO. 100% private in your browser.

Resize Images Free Now

Frequently Asked Questions

Is this image resizer free?

Yes. It is completely free — no signup, no daily limits, and no premium unlock for basic resizing.

Does the image resizer upload my files to a server?

No. There is no server upload. Resizing runs entirely in your browser, so images never leave your computer.

Can I resize an image to 16×16?

Yes. Use the 16×16 preset or type custom dimensions, then export as PNG or ICO.

Which export formats are supported?

PNG, JPEG, WebP, and ICO, plus keeping the original format when possible.

Can I resize multiple images at once?

Yes. Batch resize and download a free ZIP of all completed files.