Outside of the Fox Kalmtools.
Kalmtools / Field notes

Field notes

Short, useful notes on web tools, favicons, accessibility and building calm digital things that work. Written by Outside of the Fox, the Stockport studio behind Kalmtools.

18 August 2026 · Explainer

What is brown noise? Brown, pink and white noise explained

Brown noise is a deep, low rumble with more energy in the low frequencies than white noise. Here is what brown, pink and white noise are, and how each one sounds.

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18 August 2026 · Guide

How to resize a photo for a profile picture

Crop to a square and export at around 400 by 400 pixels. The sizes that work for profile pictures and banners, and how to keep the image sharp.

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18 August 2026 · Guide

How to join two audio files into one (free)

Load both files into a browser tool that plays them end to end and export a single track. Two MP3 or WAV files, joined free, with nothing uploaded.

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18 August 2026 · Guide

How to make an electronic signature

Draw your name on a signature pad or type it in a handwriting font, then download it as a transparent PNG to place on documents. Free and in your browser.

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22 July 2026 · Guide

How to make a favicon that works everywhere (2026 guide)

Favicons still trip people up: wrong sizes, missing formats, the icon that simply will not show. Here is the short version that works across browsers, plus the exact HTML to paste in.

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29 July 2026 · Studio

Web tools that don't upload your files, and why that matters

Most online converters send your files off to a server. Ours do the work inside your browser instead. Here is what in-browser processing means for your privacy, your speed and your peace of mind.

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Work with us

We build calm, accessible digital things for a living.

Kalmtools is one of our own builds. Outside of the Fox is a design and learning studio in Stockport. Here is what we do for clients:

CreateDigital products, taken from idea to launch.
BuildWebsites, tools and systems that perform.
GrowContent, SEO and messaging that get noticed.
EnableAccessible experiences that work for everyone.

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