Image Compression
How to Compress an Image Without Wrecking Its Quality
A practical guide to reducing image file size, choosing sensible compression settings, and knowing when the original file is already the better result.
Administrator · 2026/8/12
iZip IMG ブログ
画像ともっと上手に付き合う方法
画像の圧縮・変換・サイズ変更・最適化をわかりやすく解説します。
Image Compression
Bulk Image Compression: A Practical Workflow for Web-Ready Batches
Compress a group of images consistently, avoid mixed-format surprises, and package completed files into one ZIP without losing track of failures.
Administrator · 2026/8/12
Image Conversion
PNG to JPG: Convert Without Transparency Surprises
Understand when PNG-to-JPG conversion is useful, why transparent pixels need a background, and why the new file is not guaranteed to be smaller.
Administrator · 2026/8/12
Image Conversion
JPG to PNG: What Changes—and What Does Not
Converting JPG to PNG changes the file format, but it cannot recover lost detail, remove compression artifacts, or invent transparency.
Administrator · 2026/8/12
Image Conversion
Convert HEIC to JPG for Easier Sharing and Uploads
Turn an HEIC or HEIF photo into a widely compatible JPG while understanding what happens to metadata, extra frames, depth data, and transparency.
Administrator · 2026/8/12
Image Editing
How to Resize Images to Exact Pixels Without Distortion
Choose accurate width and height values, preserve aspect ratio, and understand when resizing reduces file size or merely enlarges existing pixels.
Administrator · 2026/8/12
Image Editing
Image Cropping Guide: Ratios, Composition, and Pixel Size
Crop images with intention by choosing the right aspect ratio, protecting the subject, checking output pixels, and separating cropping from resizing.
Administrator · 2026/8/12
Image Conversion
Convert WebP to JPG When an App Will Not Accept WebP
Create a compatible JPG copy from WebP while choosing a quality level and deciding what should replace any transparent pixels.
Administrator · 2026/8/12
Image Conversion
Convert JPG to WebP for Leaner Web Images
Use WebP as a web-delivery format, choose a sensible quality setting, and verify actual savings instead of assuming every converted file is smaller.
Administrator · 2026/8/12
Image Editing
How to Watermark Images Without Overpowering the Picture
Add a readable text or logo watermark by balancing size, opacity, position, contrast, and the limitations of the output format.
Administrator · 2026/8/12
Image Editing
Rotate and Flip Images: Fix Orientation and Mirroring Precisely
Correct sideways images, straighten small tilts, and understand the difference between rotation, horizontal flipping, and vertical flipping.
Administrator · 2026/8/12