The ImageTool blog
Practical tips on image compression, product updates and engineering notes.
RSSWebP Image Compression Tools: Choose Based on What You Need to Do
Different people want different things with 'compressing WebP': converting JPG/PNG, reducing existing WebP size, or handling animated WebP. There is no absolute best tool, only the one that fits. This article recommends tools by scenario.
Read more →How to Batch Compress HEIC/HEIF Images on Mac: First Understand How Efficient It Already Is
Photos taken with an iPhone are 2-4 MB each; hundreds of them take up 1-2 GB. Trying to compress them reveals some tutorials convert to JPG, making files bigger, while others barely shrink. The issue is that HEIC is already a very efficient format. To make it smaller, you must use the right method.
Read more →PNG Lossless Compression Tools: Distinguish Between 'True Lossless' and 'Lossy Quantization'
Search 'PNG compression', top tools claim 'lossless', but savings vary wildly. The difference isn't magic algorithms, but that they mean different things by 'lossless'. This article clarifies the distinction and recommends tools by use case.
Read more →How to Compress GIFs Smaller: 6 Methods Ranked by Image Quality Loss
Exported a 5-second demo to GIF, only to find it's 18 MB. Uploading fails or takes ages. Why is an animated image bigger than a video? Here's how to shrink it without ugly noise.
Read more →How Much of Your CDN and Bucket Bill is Paid for Nothing
This article does not cite any "industry average" figures. The compression data cited are from our own tests, and the cost calculations provided are formulas that you can apply to the unit prices on your own bill. When looking at your cloud bill every month, most people just look at the total: it's…
Read more →User Review: ImgZilla — Mac Image Compression Tool, In-place Compression Without Changing File Paths
Citation Note: This content is from a user review, originally published on ahhhhfs (2026-08-08, category: Software > Utilities). Below is a summary of the points organized according to the original structure; please read the full article for details: <https://www.ahhhhfs.com/81932/> ImgZilla: Mac im…
Read more →How Far Should the Quality Slider Go? A Good Compression Tool Shouldn't Ask You
Open an image compression tool, and right in the center of the interface is a slider: Quality: 80. You stare at it for three seconds—75 or 85? Would dragging it to 60 make it blurry? In the end, you didn't move it and just clicked "Compress". If most people end up stopping at the default value, is t…
Read more →Mac Full Again Two Months Later? The Stuff You Delete Grows Back, The Real Growth Isn't Touched
The 'Storage Almost Full' alert is back. Last time a cleaning app scanned out over 10 GB, deleted with one click, and felt great—only for everything to be the same two months later. The problem isn't that you don't clean often enough, but that **what you delete will grow back, while the part that's…
Read more →WeChat Mini Program Main Package Over 2MB? A Budget-Friendly Reduction Checklist
Click 'Upload', and the developer tool pops up a line of red text: Main package size exceeds the 2MB limit. The version cannot be released, and the requirements are queued up. This article won't cover a theory overview, but lists methods to compress the main package back under 2MB, ordered by 'saves…
Read more →Stop thinking a simple ZIP will save space 📦
Recently, I tested a batch of JPGs that had already been compressed by websites: 📸 4,624 images 💾 Original: 1.41GB 📦 After ZIP: 1.41GB, almost no change ⚡ After ImgZilla compression: 0.75GB 🔥 Final savings: 46.8% ≈ 662MB Why ZIP doesn't work? Because JPG is already a compressed format, ZIP mainly ju…
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