E-commerce sellers

Barcode Generator

Create CODE128, EAN-13, UPC, CODE39 and ITF barcodes as PNG or SVG, free.

Image Resizer

Resize one photo or a whole batch by pixels, percentage or a longest-edge limit.

Image Compressor

Reduce JPG, PNG and WebP file size by quality or an exact target — in batches.

Image Watermark

Stamp text or a logo onto a whole batch of photos — locally, never uploaded.

Image Converter

Convert photos between JPG, PNG and WebP — one file or a whole batch.

HEIC to JPG Converter

Turn iPhone HEIC/HEIF photos into JPG or PNG — in batches, right on your device.

Social Media Image Resizer

One photo, every platform size — pick what you need and export a ZIP.

Favicon Generator

One square image in — favicon.ico, Apple touch icon and PNGs out.

CSV to Excel Converter

Turn CSV files into formatted .xlsx spreadsheets in your browser — no upload, no sign-up.

Currency Converter

Convert between world currencies with daily mid-market rates; works offline with a bundled snapshot.

Sales Tax Calculator

Add or reverse sales tax and get the total price including tax.

QR Generator

Make QR codes for links and Wi-Fi.

vCard Generator

Create a digital contact card (.vcf) ready to save on a phone or share by QR code.

Merge PDF Files

Combine multiple PDFs in any order into one file. Everything stays on your device.

Product Profit Calculator

Set a sale price against cost, shipping and platform fees to see profit, margin and ROI.

Sales Commission Calculator

Work out commission at any rate plus base salary and total monthly earnings.

Volumetric Weight Calculator

Compare dimensional weight with actual weight using 5000, 6000, 7000 or 139 divisors.

Gold & Precious Metal Weight Converter

Convert grams, Chinese liang and qian, Hong Kong tael, troy ounces and carats.

Break-Even Calculator

Find the units and revenue needed to cover fixed and variable costs, with contribution margin.

Gross Margin Calculator

Calculate gross profit, gross margin percentage and markup from cost and revenue.

Electricity Cost Calculator

Estimate kWh usage and running cost of any appliance per day, month and year.

Invoice & Receipt Generator

Create a polished invoice, receipt or quote with line items and tax, then save as PDF.

Batch File Renamer

Rename many files with find-replace, numbering and prefix rules, then download a ZIP.

QR & Barcode Reader

Decode QR codes and barcodes from an image or your camera entirely in your browser.

Passport / ID Photo Maker

Crop photos to passport and visa sizes, replace the background color and lay out a print sheet.