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AnyResizer

Free online image resizer.

Resize images instantly — free, no signup, no watermark. Works offline in your browser, no upload wait.

Drop an image to start resizing

JPG, PNG, WebP, AVIF, HEIC, GIF, BMP, TIFF. Up to 100 MB. Drop one file or up to 50 for batch.

  • Free
  • Instant
  • No signup

Tools

Every tool runs instantly in your browser — no upload wait, no server roundtrip.

Resize

All 8 tools

Compress

All 8 tools

Convert

All 46 tools

Edit

All 9 tools

Built for the way you actually work

Every tool runs in your browser tab. No server roundtrip, no waiting.

Pixel-perfect

Exact dimensions, every time. Lock aspect ratio or override. Visual snap-to common sizes.

Instant — no upload wait

WASM + Canvas APIs run the resize on your device in milliseconds. Nothing waits in a queue. Nothing rides over your network.

Format-aware

JPG, PNG, WebP, HEIC, AVIF. Per-format quality controls. EXIF-aware orientation.

What you get

Instant results

Output appears in a second or two, not after a round trip to someone's server. Slow connection? Doesn't matter.

Works offline after first load

Once the page loads, your connection can drop. The tool keeps working. Great on planes, in cafés, anywhere flaky.

Free, forever

No account. No paywall. No ads. No data sold. Open in an incognito tab if you want.

Designed for real files

Heavy JPEGs, HEIC straight from your phone, transparent PNGs, animated GIFs.

How it works

  1. Drop a file

    Drag from your desktop or pick one. The file stays on your device — no server upload step.

  2. Set your size

    Pixels, percent, or kilobyte target. Preview updates as you type.

  3. Download

    Get the file in your chosen format. Original is untouched.

Resize like you know what you are doing

  1. Tip 1:

    EXIF orientation: photos from phones often have a rotation tag instead of physically rotated pixels. AnyResizer reads the tag, rotates the pixels, and strips the tag — so the resized copy looks the same everywhere, including older Android galleries and email clients.

  2. Tip 2:

    Aspect ratio: locking it scales both axes proportionally. Unlocking it lets you stretch — useful for backgrounds and patterns, terrible for faces. Toggle deliberately.

  3. Tip 3:

    Lossy vs lossless: JPG, WebP, and AVIF discard detail to shrink. PNG keeps everything but stays large. For photos, lossy at 80% quality is usually invisible to the eye and saves 70% on size.

  4. Tip 4:

    Resampling: Lanczos is the slow, beautiful default — sharp edges, no halos. Bicubic is faster and softer. Nearest is for pixel art and screenshots where you want jagged edges preserved.

  5. Tip 5:

    Format coach: if your image has transparency, WebP or PNG. If it's a photo and you want the smallest file, AVIF. If you need universal compatibility (older clients, email previews), stick to JPG.

Common questions

How fast is the resize?

Instant for most files. A 5 MB JPG to 1920×1080 takes under 500 ms on a modern laptop. Because the work runs in your browser using WebAssembly and Canvas APIs, there is no upload step and no server queue to wait in.

Is AnyResizer really free?

Yes. No account, no paywall, no ads, no watermark. The core tools stay free.

What file types are supported?

JPG, PNG, WebP, HEIC, AVIF, and animated GIF. Output formats depend on the tool — most support JPG, PNG, and WebP.

How large a file can I work with?

Up to 50 MB per file in most tools. Browser memory is the only real limit — recent phones and laptops handle 100 MP photos comfortably.

Does it work offline?

After the first page load, yes. Disconnect your network and the tool keeps working. Refresh requires connectivity until we ship the PWA wrapper.

Are my images sent to a server?

No — and that's why it's fast. All processing happens in your browser using WebAssembly and Canvas APIs. There is no upload endpoint on our side. Open the DevTools Network panel before you drop a file and you'll see zero outbound image requests.

Why a browser tool and not a desktop app?

Less friction. Nothing to install. Nothing to update. Works on any device with a modern browser, including phones.

Does HEIC from my iPhone work?

Yes. HEIC and HEIF files are decoded in your browser using a lazy-loaded WebAssembly decoder — it only downloads the first time you drop a HEIC file. You can resize and convert to JPG, PNG, WebP, or AVIF in one step.

Can I resize many images at once?

Yes. Drop up to 50 files in a single batch, apply one set of settings, and download a ZIP containing every resized output. A rename pattern keeps filenames consistent — for example {name}-{width}x{height}.

Drop a file. Done.

Free online image resizer. Instant, no signup, no watermark.

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