Practical tips and guides for working with images — compression, formats, sizing, and more.
Actual compression numbers from testing hundreds of images. The exact quality settings, resize ratios, and format tricks that get you under 100KB.
GuideI've converted millions of images through imagemochi. Here's what I've learned about when each format actually makes sense, with real file size comparisons.
ReferenceEvery dimension for every platform, updated for 2026. Plus the sizing mistakes I see people make constantly.
GuideDPI is the most misunderstood concept in imaging. Here's what actually matters, what doesn't, and how to stop overthinking it.
GuideWhy your PDF-to-image conversions look blurry, and the exact DPI and format settings that fix it. Tested with real documents.
GuideIf you've ever gotten a confusing error trying to upload a photo from your iPhone, HEIC is probably the culprit. Here's the quick fix.
InsightAfter a year of running imagemochi, here's the real data on which image tools get used, which ones surprised me, and which ones nobody cares about.
Deep DiveI compressed the same JPEG 50 times in a row and measured the degradation at each step. The results were not what I expected.
Deep DiveI compressed 50 photos at every quality setting from 10 to 100 and measured the results. Here's where the sweet spot actually is.
GuidePractical steps to optimize images for web performance. Specific techniques I use that cut page load times by 60-70%.
ReferenceExact dimensions, file sizes, DPI, and background color requirements for passport photos in 30+ countries. Updated for 2026.
InsightWhy imagemochi processes everything in your browser, what that means for privacy, and when server-side actually makes more sense.
GuideYour phone photos contain GPS coordinates, timestamps, device info, and more. Here's what metadata is, when it's a problem, and how to strip it.
GuideWhen you need to resize, compress, or convert 50 images at once, here's the approach that actually saves time.
InsightMost 'free' image tools send your files to their servers. Here's why they do it, what the risks are, and how to know if a tool is actually processing locally.
GuideWhy your images look wrong on social media, the cropping rules each platform uses, and how to prepare images that display perfectly everywhere.
Deep DiveThe actual reason printed photos don't match what you see on screen, explained without jargon. Plus how to fix it.
GuidePractical watermark advice from someone who's seen thousands of watermarked images. What works, what doesn't, and the settings that look professional.
GuideSharpening is the most overused tool in image editing. Here's when it actually helps and the settings that don't make images look crunchy.
StoryThe full story of building a 550-page image tool site as one person. The tech choices, the mistakes, and what I'd do differently.