Support
Help centre
Short answers to the things people actually ask.
Getting started
The basics of using DevToolery.
- Getting startedHow to find a tool and use it.
- Working offlineHow to keep DevToolery available without a network connection.
- Using the command paletteThe fastest way to reach any of the 104 tools.
- Theme and editor settingsDark mode, font size and line wrapping.
- AccessibilityKeyboard navigation, focus, motion and contrast.
- Why every tool lists its limitationsWhat that block underneath the tool is for.
Using the tools
Shortcuts, options and behaviour.
- Saving and exporting snippetsHow the workspace stores your saved output and how to move it.
- Keyboard shortcutsEvery shortcut in DevToolery.
- Which JSON tool do I need?There are fourteen of them. This is how they divide up.
- What each regex flag doesThe seven flags, and when you actually need them.
- Using the diff toolsSplit, inline and unified views, and when to turn on structural comparison.
- Hashing, encryption or encoding?Which tool you need depends on whether the data must be readable again.
- Reading the contrast figuresWhat the AA and AAA labels in the colour converter mean.
- Sharing and exporting resultsCopy, download and export — and why there are no share links.
Privacy and data
What is stored and how to remove it.
- Does my data leave my browser?No. Here is how to confirm that for yourself.
- Clearing everything DevToolery storedHow to see and remove local data.
- Why some tools have no Save buttonTools handling credentials deliberately cannot write to storage.
- Is it safe to paste work data here?The technical answer, and what to check with your own organisation.
Troubleshooting
When something does not work.
- Why is my JSON invalid?The handful of mistakes behind almost every parse error.
- Working with large filesWhat the practical limits are and why they exist.
- CSV delimiter detectionHow the delimiter is guessed and when to set it yourself.
- My timestamp converted to 1970Almost always a seconds-versus-milliseconds mix-up.
- File size limitsWhy the file tools stop at 10 MB and what to do above it.
- Browser supportWhat is required and what happens when something is missing.
- Reporting a problemWhat to include, and what never to include.