Guides
Picmu guides for image, video, and audio work
Browse Picmu guides for image formats, web and email compression, print prep, local browser processing, and practical video and audio work.
How to use the library
Start with the decision you need to make, then open the tool built for that job.
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Guides that help you avoid the most common export mistakes
Start here when you need to choose a format, reduce file size safely, or decide whether the browser is the right place for the job.
Marketplace image guide hub
Marketplace images
A practical marketplace image hub covering product photo framing, aspect ratios, white backgrounds, compression, and platform-specific prep.
Marketplace guide
Amazon image requirements
A practical Amazon guide covering 2000 x 2000, 1:1, JPG, and the mistakes that weaken listing photos.
Website format guide
Best image format for websites
A practical website-focused guide to choosing between PNG, JPG, WebP, and AVIF.
Delivery guide
Compress an image for email or web
A practical compression guide built around common delivery destinations like email and websites.
Capability guide
Browser video capability limits
A guide to browser-native video support, MediaRecorder reality, playback limits, and why honest restrictions build trust.
Image formats and conversion choices
Compare formats, understand transparency tradeoffs, and choose the right destination before you export.
Practical guide
How to convert PNG to JPG
A practical guide to PNG-to-JPG conversion, transparency tradeoffs, and browser-only export choices.
Format guide
PNG vs JPG vs WebP vs AVIF
A format comparison guide focused on transparency, compatibility, compression, and real-world use cases.
Format decision guide
When to use PNG instead of JPG
A practical guide to deciding when PNG is the right format and when JPG is the wrong shortcut.
Website format guide
Best image format for websites
A practical website-focused guide to choosing between PNG, JPG, WebP, and AVIF.
Image delivery, compression, and resize
Use these guides when the goal is a smaller file, a cleaner resize, or a safer handoff for email and the web.
Delivery guide
Compress an image for email or web
A practical compression guide built around common delivery destinations like email and websites.
Optimization guide
Reduce image file size without ruining quality
A practical guide to shrinking image files with dimension, format, and compression decisions that work together.
Resizing guide
Resize without stretching
A practical guide to preserving aspect ratio and choosing safer resize settings for real image workflows.
Print, privacy, and repeatable image work
Prepare files for print, make sense of DPI, keep processing local, and build a repeatable browser workflow.
Print guide
How to prepare an image for print
A practical guide to print readiness, required pixels, and clear print export decisions.
Print terminology guide
What 300 DPI means
A clear guide to DPI, physical size, and why the number alone does not make a small image print-ready.
Privacy guide
Browser-only privacy benefits
A guide to the privacy, trust, and workflow advantages of keeping image processing local in the browser.
Batch workflow guide
Batch image conversion explained
A practical guide to queue-based image processing, shared settings, and clean ZIP export workflows.
Icon guide
Create a favicon from an image
A practical guide to favicon prep, source selection, composition cleanup, and icon export.
Screenshot guide
Clean up a screenshot before export
A practical guide to screenshot cleanup for documentation, support replies, articles, and product communication.
Marketplace image prep and platform-safe product photos
Use these guides when the real job is marketplace listings: safer framing, aspect ratios, white backgrounds, cleaner main images, and platform-specific product-card preparation.
Marketplace image guide hub
Marketplace images
A practical marketplace image hub covering product photo framing, aspect ratios, white backgrounds, compression, and platform-specific prep.
Resize guide
Marketplace image resizer guide
A guide to resizing product photos for marketplace cards without pushing the product into risky crop edges.
Crop guide
Marketplace image cropper guide
A guide to cropping product photos for marketplaces while keeping the subject readable in the final card.
Product-photo crop guide
Crop product images for marketplaces
A practical crop workflow for marketplace product photos, search thumbnails, and stricter first-image rules.
Marketplace resize workflow
Resize product photos for marketplaces
A practical workflow for resizing marketplace product photos, preserving the full product, and exporting safer upload dimensions.
Aspect ratio guide
Marketplace image aspect ratio
A guide to marketplace image aspect ratios, safer product placement, and when square or vertical frames actually make sense.
Background guide
White background guide for product photos
A practical guide to white backgrounds, transparent cutouts, and calmer main images for marketplace listings.
Listing-structure guide
Main image vs gallery image
A guide to the different jobs done by main marketplace images and supporting gallery images.
Compression guide
Compress product photos for marketplace uploads
A guide to reducing marketplace upload weight while keeping product edges, backgrounds, and listing clarity intact.
Marketplace guide
Ozon image requirements
A practical Ozon guide covering 900 x 1200, 3:4, JPG, and the mistakes that weaken listing photos.
Marketplace guide
Wildberries image requirements
A practical Wildberries guide covering 1400 x 1800, 7:9, JPG, and the mistakes that weaken listing photos.
Marketplace guide
Yandex Market image requirements
A practical Yandex Market guide covering 900 x 1200, 3:4, JPG, and the mistakes that weaken listing photos.
Marketplace guide
Amazon image requirements
A practical Amazon guide covering 2000 x 2000, 1:1, JPG, and the mistakes that weaken listing photos.
Marketplace guide
Etsy image requirements
A practical Etsy guide covering 2000 x 2000, 1:1, JPG, and the mistakes that weaken listing photos.
Marketplace guide
eBay image requirements
A practical eBay guide covering 1600 x 1600, 1:1, JPG, and the mistakes that weaken listing photos.
Marketplace guide
Walmart Marketplace image requirements
A practical Walmart Marketplace guide covering 2200 x 2200, 1:1, JPG, and the mistakes that weaken listing photos.
Marketplace guide
Shopify product image size
A practical guide to Shopify product image sizing, consistent aspect ratios, and cleaner featured images.
Video formats, browser limits, and safe fallback paths
Learn where browser video tools are dependable, where they are partial, and how to keep moving when export support is uneven.
Video compression guide
Compress video without breaking playback
A practical guide to smaller video files, container choices, and honest browser-native limits.
Video format guide
MP4 vs WebM
A clear comparison of MP4 and WebM for playback reach, browser export reality, and practical web delivery.
Video trim guide
Trim video in the browser
A guide to quick browser-native clip edits, capability checks, and realistic fallbacks.
Cross-media guide
Extract frames from video
A guide to local still-frame capture, timing, and image follow-up workflows.
Capability guide
Browser video capability limits
A guide to browser-native video support, MediaRecorder reality, playback limits, and why honest restrictions build trust.
Audio formats, browser limits, and smarter local tool choices
Understand speech-friendly compression, realistic trim expectations, local waveform analysis, and where browser audio export is strong or limited.
Audio compression guide
Compress audio without ruining speech clarity
A practical guide to speech-first audio compression, bitrate choices, and browser export limits.
Audio format guide
WAV vs MP3 vs M4A vs Opus
A practical format guide for browser audio workflows, editing copies, and lighter delivery files.
Audio trim guide
Trim audio in the browser
A guide to browser audio trimming, waveform-backed region planning, and practical export paths.
Capability guide
Browser audio capability limits
A guide to browser audio support, decode constraints, MediaRecorder limits, and why page-level checks matter.
Product guide
How local audio processing works in Picmu
A guide to Picmu's browser audio pipeline, local file handling, waveform analysis, and export constraints.
Keep going in Picmu
Move from the guide straight into the right Picmu tool.
The guide library links straight into live Picmu tools, so once the decision is clear you can keep working without rebuilding the setup.