Reduce file size for JPG, PNG and WebP without losing visible quality. Ideal for websites, presentations and mockups.

Resize images for Instagram, banners, e-commerce and presentations. Ready formats or custom size.

Find your real profit after commissions, ad spend and shipping — and the price you need to charge to hit your margin.

Validate a barcode number instantly, or generate the correct check digit for a new one. Paste one code or a whole catalog list.

Check your title, bullet points, description and backend search terms against Amazon's real 2026 character and byte limits.

Check your title, tags and description against Etsy's real limits — 140-char title, 13 tags of 20 characters, 10,000-char description.

Check your main image for the 1,000px minimum size and pure white background before you upload it — 100% local, the image never leaves your browser.

Calculate cubic weight with the Correios formula and see whether actual or cubic weight gets billed. Divisor is editable for other carriers.

Estimate which FBA size tier your product falls into — Standard, Bulky or Extra-Large — from its dimensions and weight, with source conflicts disclosed honestly.

Checks title, subtitle, description and photo limits against the real, live data for your specific category — fetched straight from Mercado Livre's own public API, not guessed flat numbers.

Checks title, subtitle, SKU, condition description, item specifics and photos against the real numbers stated in eBay's own Trading API reference.