Tools starting with B

Replace one colour in an image with another, or make it transparent, with adjustable tolerance.

Generate Code 128, EAN-13, EAN-8, UPC, Code 39 and ITF-14 barcodes as PNG or SVG.

Encode text to Base64 or decode Base64 back to text, with UTF-8 and URL-safe support.

Estimate how long a battery will last from its capacity and the current a device draws.

Work out the document size with bleed, the safe area inside the trim, and the finished size after cutting.

Apply a Gaussian blur to a whole image, at any radius.

Calculate body mass index from height and weight, in metric or imperial units.

Convert BMP images to JPG in your browser, with no upload and no watermark.

Convert BMP images to PNG in your browser, with no upload and no watermark.

Estimate resting metabolic rate and daily calorie needs from height, weight, age and activity.

Generate BreadcrumbList JSON-LD so results show a path rather than a bare URL.

Find how many units you must sell to cover fixed costs, and the revenue that represents.

See your screen size, user agent, device pixel ratio, time zone and browser capabilities.

Compress many images at once with a shared quality setting, and see what each saved.

Convert many images to JPG, PNG or WebP at once and download them as a ZIP.

Resize many images to one width at once, keeping proportions, and download a ZIP.

Design a business card and export a print-ready PDF with bleed, a safe area and crop marks.