#free-tools
Practical guides for online sellers: product photos, marketplace listings, video ads and growing your store.
How to Watermark Photos (2026): Free Watermark Maker, Phone and Lightroom
Add a text or logo watermark to product photos for free, with settings that look professional, and learn which marketplaces ban watermarks.
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How to Create UTM Links (2026): Parameters, Naming and Seller Examples
Tag your links so analytics shows which post, ad or email made the sale: every UTM parameter, naming rules, seller examples and where UTMs don't work.
What Is a JFIF File? Why Windows Saves Them and How to Convert to JPG (2026)
What a .jfif file is, why your browser saves images that way, what eBay, Etsy, Amazon, Shopify, Vinted and Poshmark accept, and how to rename or convert to JPG.
How to Split a Photo Into an Instagram Grid (2026): Sizes and Posting Order
The pixel sizes for 3x1, 3x2 and 3x3 Instagram grids, why the 3:4 profile crop breaks lines at the seams, and how to post the pieces so the picture lines up.
How to Compress an Image to 1MB or 500KB (2026): Free, Keeps Quality
Get photos under 1 MB or 500 KB for email, marketplaces, store pages and upload forms, at the highest quality that fits, with free methods on every device.
Free Photo Editing Apps for Online Sellers (2026): What Each Does Best
The free editors already on your phone, Snapseed, Lightroom's free tier and no-sign-up browser tools: what each does for product photos, their limits, and when free stops being enough.
How to Compress an Image to 50KB (2026): Free Steps for Phone and PC
Shrink any photo or scan under 50 KB: what size fits, free methods on phone and computer, and how to stop compression from blurring faces and text.
How to Compress an Image to 20KB (2026): Photos and Signatures, Free
Get a photo or signature under 20 KB for an application form: the dimensions that fit, free methods on every device and how to keep it legible.
How to Compress an Image to 200KB or 1MB (2026): Free on Phone and PC
Get photos and scans under 200 KB or 1 MB for forms, portals and websites, with free methods on every device and the dimensions that fit.
How to Compress an Image to 100KB (2026): Free on Phone, Windows and Mac
Get any photo under 100 KB for a form or website: the pixel size that fits, free methods on every device, and why compressed photos go blurry.
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