The toolbox
Twenty-seven free, browser-based tools for Etsy, Amazon and print-on-demand sellers. No signup, no uploads — every tool runs on your device. Start with the Etsy & Amazon fee calculator, our flagship.
All tools
Etsy & Amazon Fee Calculator
Enter cost, price and shipping to see real net profit, margin and your break-even price.
POD Profit Calculator
Printify, Printful and Gelato margins — net profit, break-even and markup, with editable presets.
Etsy Title & Tag Counter
Check your 140-character title and all 13 tags for length, duplicates, empty slots and overflow.
Amazon Listing Limit Checker
Count Amazon title, bullet and 250-byte backend keyword limits — characters, bytes and mobile pixels.
Amazon 75-Character Title Checker
Amazon caps titles at 75 characters from 27 July 2026 — see what to cut and write your Item Highlights.
Amazon FBA Barcode Generator
Render FNSKU, UPC, EAN and Code128 labels to PNG or SVG with checksum and Avery sizes.
Etsy & Amazon Resizer
Batch-resize, pad and print-check listings to exact Etsy, Amazon and eBay dimensions in one click.
Product Shadow Generator
Drop a realistic shadow under a cut-out product photo — tune opacity, blur, angle and background.
Social Media Crop Tool
Crop to exact Instagram, Pinterest, TikTok and YouTube sizes with rule-of-thirds guides.
Seamless Pattern Maker
Turn any tile into a perfectly repeating, edge-matched pattern for fabric, wrap and POD products.
Wall Art Size Guide
Build a to-scale wall-art size guide image — pick print sizes, see them on a room wall at true scale, download a PNG.
Color Code Converter
Convert HEX, RGB, HSL and CMYK instantly, plus WCAG contrast, shade ramps and schemes to copy.
Image to ASCII Art
Convert any photo into copy-ready ASCII text art — tune width, character set and color.
POD Print File Checker
Check a print file against Amazon Merch, Printful, Printify and Redbubble rules — pixels, DPI, PNG, transparency — before it's rejected.
Tumbler Wrap Template
Generate an exact tapered wrap template for 20oz, 30oz and 40oz tumblers with real frustum math, then download SVG or PNG.
Sticker Border Maker
Add a clean die-cut white outline around any transparent PNG, ready for sticker printing.
Cricut SVG to PNG Converter
Rasterize SVG cut files to high-resolution transparent PNG for Cricut, Silhouette and DTF.
Amazon Main Image Checker
Check a listing image for a pure white background, 85% frame fill and 1600px zoom resolution before you upload.
Etsy Crop Preview
See how one photo crops to a 1:1 thumbnail, 4:3 desktop and 3:4 mobile view, plus the safe area that survives all three.
Etsy 20MB File Fitter
Shrink an image under Etsy's 20 MB download limit — set a target size, pick JPEG, PNG or WebP, get a file that fits.
Etsy Video Spec Checker
Check a listing video before you upload: 5–15 seconds, under 100 MB, 500px minimum on the short side.
Print Bleed Generator
Add mirrored bleed at your exact trim size and DPI, preview the cut and safe lines, then download a print-ready PNG.
T-Shirt Print Placement
Pick a garment, size and print position for the recommended design width, drop below the collar and a to-scale diagram.
US Landed Cost & DDP Calculator
Add duty, shipping and fees to your product cost, then solve for a DDP sale price that still hits your target margin.
EU Import VAT & Duty Estimator
Work out the taxable base, VAT, the per-item duty on parcels under €150, what the customer pays and what you keep.
GPSR Safety Label Builder
Enter manufacturer and EU responsible person details, pick a label size, and download a print-ready PNG at 300 DPI.
Digital Product License Generator
Build a plain-language usage licence — tick what buyers may and may not do, then copy, download or print it.
No tools match that search. Try a different word or clear the filters.
Start from the job, not the list
Twenty-seven tiles is a lot to scan when you are halfway through something. Nobody wakes up wanting a "listing limit checker" — they want to know whether the title they just wrote will survive. So here is the same toolbox arranged by the thing you were actually doing when you landed here.
You are about to price something and want to know if it is worth selling
The Etsy & Amazon Fee Calculator is the flagship and the right starting point: put in your cost, your price and your shipping and it returns net profit, margin and the break-even price below which the sale is costing you money. If the item is print-on-demand, the POD Profit Calculator does the same thing with Printify, Printful and Gelato base costs already loaded, so you are adjusting a preset rather than digging through a price list.
The title is too long and something has to be cut
For Etsy, the Title & Tag Counter checks the 140-character title and all thirteen tags at once and flags duplicates and empty slots — the two things that quietly waste keyword space. For Amazon, the Listing Limit Checker counts titles, bullets and the 250-byte backend field, which is measured in bytes rather than characters and so behaves oddly with accented letters and emoji. If you are dealing with the 75-character cap specifically, the 75-Character Title Checker is built for that one deadline and helps you move the overflow into Item Highlights.
The photo is wrong and the listing is due
Etsy & Amazon Resizer handles the bulk case — batch resize and pad to exact marketplace dimensions. When the problem is a specific rule rather than a size, the narrow tools are faster: Amazon Main Image Checker for the white-background and fill rules, Etsy Crop Preview for what the thumbnail crop will do to your composition, Etsy 20MB File Fitter when the upload is rejected for size, and Etsy Video Spec Checker for listing video. Product Shadow Generator and Social Media Crop Tool are for the version of the image that goes everywhere else.
A print file has to reach a provider and you are not sure it will pass
Run it through the POD Print File Checker first; it looks at the things providers reject for rather than the things that merely look wrong on screen. Print Bleed Generator adds the bleed a cutter needs, Sticker Border Maker builds the white keyline die-cut stickers are usually sold with, and Cricut SVG to PNG Converter exists because cutting software and print software rarely want the same file. If you are selling a repeat print, Seamless Pattern Maker makes the tile actually tile.
The artwork has to sit correctly on a physical object
These three are geometry problems more than image problems. Tumbler Wrap Template turns your measurements into the curved fan a tapered cup actually needs — a rectangle will never wrap cleanly. T-Shirt Print Placement gives the widths and collar drops per garment size. Wall Art Size Guide shows how a print reads at room scale, which is the difference between a poster that looks right above a sofa and one that looks like a postage stamp.
The parcel is leaving the country
US Landed Cost & DDP Calculator and EU Import VAT & Duty Estimator exist because duty and VAT are now something you quote at checkout rather than something the buyer discovers at the door. GPSR Safety Label Builder assembles the label the EU expects on a consumer product. If what you sell is a file rather than a thing, the Digital Product License Generator writes the plain-language licence that should have been in the download folder all along.
Why the filter chips are split the way they are
The category buttons above are not evenly sized, and that is deliberate — they track where the work actually piles up rather than making a tidy grid.
- Images & Design — 11 tools
- The biggest group by a distance, because every marketplace has its own pixel rules and they do not agree with each other. Most people arrive here for one specific rejection message. Color Code Converter is the outlier that gets used for brand consistency rather than for uploads, and Image to ASCII Art is, honestly, the one toy in the toolbox.
- POD & Print — 6 tools
- Everything that has to survive contact with a physical printer or cutter: bleed, keylines, wrap geometry, placement and file conversion. The failure mode here is not an error message but a box of product that came out wrong.
- Listings & Keywords — 4 tools
- Character counts, byte counts and barcodes. Small tools, but they are the ones you open repeatedly, because a listing gets edited far more often than it gets photographed.
- Compliance & Legal — 4 tools
- The newest group and the one that grew fastest, thanks to a run of 2026 rule changes on both sides of the Atlantic. Treat the outputs as working estimates and drafts, not as filings — these are not tax, customs or legal advice, and a tariff classification in particular is worth having a broker confirm when real money rides on it.
- Pricing & Fees — 2 tools
- Only two, because there are really only two questions: what does a marketplace take, and what does a print provider take. Fee schedules change, so the calculators expose the rates as editable fields instead of burying them — if a platform moves a percentage, you can correct it yourself rather than wait for us.
One thing every tool here has in common: the work happens in the page. Images you load are read and redrawn by your own browser, and the calculators are arithmetic running on your device. Nothing is uploaded to us, there is no account, and closing the tab is all the clean-up there is. If you want the reasoning behind the numbers rather than the numbers themselves, the guides cover the same ground in prose.
Guides & How-tos 5
Short, practical reads that pair with the tools above — sizing, file specs and the mistakes that get listings rejected.
DPI vs PPI, Explained
What each term really means, why they get mixed up, and the one formula that turns pixels into a real print size.
Etsy Image Sizes (2026)
Every Etsy image size in one place: listing photos, shop icon, banners and profile picture — exact pixels and ratios.
How to Make Seamless Patterns
The offset technique step by step, half-drop vs straight repeat, and the mistakes that make a tile look obviously tiled.
POD Image Requirements
Resolution, DPI and file rules for Printful, Printify and Redbubble, plus the errors that get designs rejected.
Sticker Sizes for Die-Cut
Standard sizes, how much bleed and white border you need, die-cut vs kiss-cut, and exact pixels at 300 DPI.