Developer Tools
Formatters, validators, encoders, hash functions and generators — the utilities you open in a spare tab mid-task. They run locally, so pasting a token or a production payload into one is not a disclosure.
16 tools · 16 run entirely in your browser
Barcode Generator
Code 128 barcodes from any text, in bulk, downloadable as SVG.
In-browserEmail Signature Generator
Professional HTML email signatures that survive Outlook, Gmail and Apple Mail.
In-browserFractal Explorer
Real-time Mandelbrot rendered on your GPU with WebGPU.
In-browserHTML Editor
Live HTML editor with split preview.
In-browserHTML Formatter
Format messy HTML into clean, indented markup.
In-browserHTML Viewer
Render any HTML source in a sandboxed preview.
In-browserJSON Formatter
Format, validate and beautify JSON with collapsible nodes.
In-browserMD5 Generator
Generate MD5, SHA-1 and SHA-256 hashes for any text or file.
In-browserMinify CSS
Compress CSS by stripping whitespace, comments and dupes.
In-browserMinify HTML
Minify HTML with smart whitespace + attribute compression.
In-browserMinify JS
Minify JavaScript with terser-class compression.
In-browserMock Data Generator
Realistic test data as JSON, CSV or SQL — seeded, so fixtures are reproducible.
In-browserPHP Formatter
Pretty-print PHP with PSR-12 indentation.
In-browserRegex Tester + Explainer
Test a regular expression live and get a plain-English breakdown of every token.
In-browserXML Beautifier
Pretty-print XML with attribute alignment.
In-browserXML Formatter
Format XML with namespace-aware indentation.
In-browserFrequently asked questions
How many Developer Tools does ToolMunch have?
16 right now, and every one of them runs entirely in your browser. The grid on this page is the complete set — it is generated from the catalogue, so it is never a stale list.
Are the Developer Tools free to use?
Yes, all 16 of them. No trial, no premium tier holding back the main feature, and no daily or hourly cap on how many times you can use one.
Do I need an account to use the Developer Tools?
No. There is no account, no email address, and no login. Open the tool you need, do the job, and take the result.
Where do the Developer Tools do their work?
On your own device. Every tool on this page does its work inside your browser tab, so nothing you open or type is uploaded and there is no copy of it sitting on a server.
Do the Developer Tools work on Mac, Windows, and phones?
Yes. Everything here runs in a modern web browser on Windows, macOS, Linux, Chromebook, Android, and iOS. There is nothing to download or install.