Bigger.
Nothing else changes.

Enlarge product photos and AI-generated images on your Mac. No AI. Nothing invented. Your photos stay on your Mac.

The proof is at 100%.

Compare the pixels, then choose the size. Here, “exact” means Lanczos-3 resampling in linear light. It describes the method, not new detail.

The same 64 × 64-pixel source region at 256 × 256 pixels. Left: the source pixels, each a 4 × 4 block, no interpolation. Right: Lanczos-3 in linear light, with sharpening off. Source 1,536 × 1,024 → export 6,144 × 4,096. Reference resample for this page; the app’s own export replaces it before launch.

Exact resampling

Lanczos-3 calculates every output pixel from the source, in linear light.

Colour-managed

Embedded colour profiles guide processing and are kept where the export format supports them.

Private by design

Photos are processed on your Mac and never uploaded. No account, no analytics. The only online step is activating a licence.

Lower draft costs

Where your generator charges less for smaller images, spend less finding the one to keep.

Keep your composition

Re-rendering at a larger size is a new generation: hands, textures, text and layout can change. Resampling keeps the composition you approved.

Straight from Finder

Right-click the file and choose MacnifyIt ▸ Enlarge 2×, 4× or 8×.

One payment

$49 one-time. One online activation, then enlarge offline, with no account.

The bag on this page is a ChatGPT-generated image: 1,536 × 1,024 at source, 6,144 × 4,096 at 4×. The crops above show real Lanczos-3 resampling at 100%.

Enlarging cannot add detail missing from the source. Start with enough detail for the job, then check the larger result at 100%.

Open

Drop in a photo, a selection of files, or a whole folder. JPEG, PNG, TIFF, HEIC and WebP. Or skip the window: right-click in Finder.

Choose the size

Pick 2×, 4×, 8×, or a target long edge in pixels. See the output dimensions before you start. One approved image, every output size you need.

Check at 100%

Compare the source and the result at output pixel scale before exporting.

Export

Save as PNG, JPEG or TIFF. Keep colour profiles and supported metadata, preserve orientation, and remove GPS data if you choose.

Right-click. Done.

Select photos in Finder, right-click, and choose MacnifyIt ▸ Enlarge 2×, 4× or 8×. The exports land next to the originals as name_4x.png, with a progress window you can stop at any time. No app window needed.

What stays

What stays out

One payment. A licence to keep.

No subscription. Later updates are optional; the versions you have keep working on compatible Macs.

The licence is a code you enter in the app. It activates one Mac with a quick online check, then works offline, renewing quietly about once a month when the Mac is online.

Prices in USD. Applicable VAT or sales tax is shown at checkout before you pay. Paddle is our merchant of record and handles payments and billing enquiries. All sales are final: the free trial is there to test MacnifyIt on your own photos before you buy — see the Refund Policy. Before purchase: Terms of Service · Privacy Policy · Refund Policy.

Try it on your own photos.

Ten full-resolution exports. Unlimited previews. No account. Open the disk image and drag MacnifyIt to Applications; the Finder menu switches on from the app’s first-run screen. Your first successful export uses one of ten; previews, failed and stopped exports never count.

MacnifyIt-[version].dmg · [size] MB · System requirements · Planned support: macOS 12 or later · Intel and Apple silicon (tested so far only on macOS 26.6) · [Notarized by Apple — show only after verification] · SHA-256 [checksum] · Copy SHA-256 · What’s in this version →

Download for Mac

How does it enlarge a photo?

MacnifyIt calculates a larger image from the pixels in your source, using Lanczos-3 resampling in linear light. It does not invent detail. The comparison above shows what that method does at output size.

Will my photos leave my Mac?

No. Photos are processed locally and never uploaded, and the app has no analytics. MacnifyIt connects to the internet only to activate a licence and to renew it quietly about once a month, sending your licence code and a hashed Mac identifier to our activation provider, Cloudflare, which also receives your IP address; nothing else is sent. Purchasing happens through Paddle, which is separate from photo processing, and this website uses aggregate, cookieless analytics from Cloudflare.

What is Lanczos-3, and why “exact”?

A resampling filter that calculates each output pixel from nearby source pixels, used in imaging pipelines for decades. “Exact” means this stated method, applied in linear light. It does not mean the larger file contains detail the source never captured.

Does it sharpen?

Only if you switch sharpening on. It is off in every comparison on this page, so you can judge the resampling itself.

Can I use it for client work?

Yes. The licence covers personal and commercial use, including client work. You remain responsible for having permission to use the source photographs.

Can I enlarge AI-generated images?

Yes. Open a supported image file and choose the size. MacnifyIt uses Lanczos-3 resampling in linear light to enlarge the saved image. If your generator charges less for smaller images, drafting small can reduce generation costs. Enlarging cannot add missing detail, so check the result at 100% before exporting.

What if it isn’t for me?

Try it first: ten full-resolution exports are free, with unlimited previews, so you can judge the results on your own photos before paying. Because of that, all sales are final and we don’t offer refunds after purchase. Statutory rights that cannot be excluded by law are not affected; see the Refund Policy.

Bigger. Nothing else changes.