Guides

How to compress images for websites

A practical checklist for reducing image file size while keeping pages sharp and usable.

Images4 min read
Quick guide

What to check first

Resize before compressing

Large camera photos often contain far more pixels than a website needs. A 4000px-wide image shown in a 900px content area wastes bandwidth and can slow down the page.

Start by setting a realistic maximum width and height. Then adjust quality to find the smallest file that still looks good.

  • Use 1200-1600px for many article images
  • Use smaller dimensions for thumbnails
  • Keep original files separately before exporting

Pick the right format

JPEG works well for photos. PNG is useful for graphics that need sharp edges or transparency. WebP and AVIF can produce smaller files, but compatibility and workflow needs still matter.

If a transparent logo becomes a JPEG, the transparency is lost. If a photo stays as PNG, the file may be much larger than necessary.

Compare output sizes

Do not chase the smallest number blindly. A slightly larger image that looks clean is usually better than an over-compressed image with visible artifacts.

Batch compression is helpful when you have a folder of images, but check a few samples before publishing everything.

Step-by-step workflow

Start by opening the main tool for this guide, Image Compressor. Add the input carefully, check the available options, and run a small test before using the final result in a real page, file, post, or document.

After the first result appears, compare it with your goal instead of accepting it immediately. The best output usually comes from one or two small adjustments, such as changing a size, format, keyword, timing value, tone, or calculation input.

  • Prepare the input before opening the tool
  • Run a quick test with a small sample
  • Adjust one setting at a time
  • Review the final output before sharing it

Common mistakes to avoid

Most images tasks go wrong because the input is incomplete, the output format does not match the destination, or the result is used without a quick review. A minute of checking can prevent repeated edits later.

Image workflows are easier when you decide the final size, format, and quality before exporting. Resizing, cropping, compressing, and converting all solve different problems.

  • Do not enlarge small images too much
  • Choose crop settings before final resizing
  • Compare file size and visible quality after export

How this fits into a larger workflow

This guide works well alongside Image Compressor, Image Resizer, and Image Format Converter. Use the first tool to solve the main task, then use a related tool when you need to clean, preview, convert, resize, calculate, or publish the result.

For repeat work, keep a simple checklist of the settings that produced the best result. That makes the next file, image, caption, calculation, or page update faster and more consistent.

  • Use Image Compressor when it matches the next step of the task
  • Use Image Resizer when it matches the next step of the task
  • Use Image Format Converter when it matches the next step of the task

Quick quality checklist

Before you finish, check the output as if someone else will use it. Clear results are easier to publish, send, upload, print, copy, or reuse later.

If the output will appear in public, read it one more time for accuracy, formatting, and context. Small cleanup work can make the final result feel much more professional.

  • Is the result accurate?
  • Is the format correct for the destination?
  • Is anything missing, duplicated, or unclear?
  • Would the result make sense to a first-time visitor?

Frequently asked questions

What image quality should I use?

For many web photos, a quality value around 70-85% is a good starting point. The best value depends on the image detail and format.

Should I resize or compress first?

Resize first when the image dimensions are too large, then compress the resized output.

Why should I follow a guide instead of just using the Image Compressor?

The tool handles the task, but a guide helps you choose better inputs, avoid common mistakes, and understand what to check before using the result.

Can I reuse this images workflow?

Yes. Once you find settings and checks that work well, reuse the same workflow for similar files, text, images, calculations, captions, SEO snippets, or social posts.

What should I do if the result does not look right?

Go back to the input, change one option at a time, and compare the output again. This makes it easier to find which setting caused the issue.