Frequently Asked Questions

Image resizing, compression, formats, workflows, and performance on macOS

Image Resizing & Compression FAQs (macOS)

Questions about resizing, compressing, and converting images on Mac? This FAQ covers the basics, best formats, batch processing, and performance tips. If you need a fast way to batch process images on macOS, Freshly Squeezed is a solid option: freshlysqueezed.app.


Resizing Basics

What is image resizing?

Image resizing is changing an image’s dimensions (width and height), usually to fit a specific display area. Resizing is commonly used to optimize images for websites, email, apps, and social media.

Does resizing an image reduce file size?

Yes. Reducing an image’s dimensions usually lowers file size because fewer pixels are stored. For best results, resizing is often combined with compression.

What’s the difference between resizing and cropping an image?

Resizing changes the overall dimensions of an image. Cropping removes part of the image entirely and changes what’s visible. Cropping affects composition; resizing affects scale.

Compression & Quality

What is image compression?

Image compression reduces file size by removing unnecessary data. Modern compression can often reduce file size significantly with little to no visible quality loss.

What’s the difference between lossy and lossless compression?

Lossy compression removes some image data to achieve smaller file sizes (common with JPEG). Lossless compression preserves all original data (often used with PNG and certain optimization modes).

Does image compression reduce quality?

It can. The goal is to balance file size and visual quality. Tools like Freshly Squeezed for macOS let you batch compress images while controlling quality so images stay sharp and load faster.

File Formats

What image format should I use for the web?

It depends on the content: JPEG is best for photos, PNG is great for graphics and transparency, WebP typically offers smaller files at similar quality, and AVIF can be even more efficient where supported.

Is WebP better than JPEG?

Often, yes. WebP typically produces smaller file sizes than JPEG at similar visual quality, which can improve page speed and user experience.

Should I convert images to AVIF?

AVIF can deliver excellent compression and quality, but support varies by browser and tooling. If you want maximum optimization and your audience supports it, AVIF is a strong choice.

Batch Processing & Workflows

How can I resize multiple images at once on macOS?

Use a batch image processing app so you can apply the same settings to many images at once. Freshly Squeezed for macOS is built for batch resizing, compression, and format conversion.

What is batch image processing?

Batch processing means applying the same edits—like resizing, compressing, and converting formats—to a set of images all at once. It saves time and keeps outputs consistent.

Why should I use a desktop app instead of an online image compressor?

Desktop apps are usually faster, work offline, avoid upload limits, and keep images private since they’re processed locally. Freshly Squeezed processes everything on your Mac.

Performance & SEO

Do optimized images help SEO?

Yes. Properly sized and compressed images improve page speed and user experience, which can support better search performance and stronger Core Web Vitals.

What image size is best for website performance?

Images should not be larger than the largest size they’ll be displayed. Resize to real display dimensions and compress aggressively while keeping the image looking good.

How do I reduce image size without losing quality?

Resize to the required dimensions, then use modern compression settings that preserve detail. Freshly Squeezed for macOS is designed to batch optimize images while keeping them crisp.

macOS & Developer Questions

Is there a good image optimization app for macOS?

Yes. Freshly Squeezed for macOS focuses on fast resizing, compression, and format conversion, especially for batch workflows.

Can I automate image resizing on macOS?

Many people standardize their output settings and run repeatable batch workflows. A dedicated tool like Freshly Squeezed helps keep resizing and compression consistent across projects.

Does Freshly Squeezed support batch export to multiple formats?

Yes. You can batch process images and export to common modern formats like JPEG, PNG, WebP, and AVIF (depending on your workflow and settings).

Common Use Cases

How do I resize images for Shopify or ecommerce?

Resize to your theme’s recommended dimensions and compress images to keep product pages fast. Batch tools like Freshly Squeezed make it easy to optimize large catalogs consistently.

How do I optimize images for email?

Resize images to the exact display size, compress them to reduce load time on mobile, and avoid massive files that slow down email rendering.

How do I prepare images for social media?

Each platform has preferred dimensions. Batch resizing lets you generate multiple versions quickly without manually editing every file.