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Toolz.dev vs the Alternatives: An Honest Comparison From the Guy Who Built It
I built toolz.dev, so this comparison is biased. Here's what it does better than TinyWow and SmallPDF, where it loses, and how to check any tool yourself.
PNG to JPG to WebP: What a Browser Converter Can Actually Do
Convert images between PNG, JPEG and WebP in your browser — free, no upload. What the canvas can and can't do, and why JPEG turns transparency black.
Lorem Ipsum, Honestly: How I Generate Placeholder Text That Actually Fits the Layout
Generate Lorem Ipsum placeholder text free, in-browser, no signup. How to size it to your real content and the one rule that saves you on launch day.
The Web Developer Toolkit I Keep in One Browser Tab Group (Free, No Uploads)
The free web developer tools I actually use — JSON, regex, JWT, CSS, images, SEO. All client-side, no signup, organized by the job you're doing.
How Diff Algorithms Work: Line, Word, Character
Compare two texts and catch every change — line, word, or character level. How diffing works (Myers 1986), when eyeballing fails, and a client-side diff tool.
Why Valid YAML Still Breaks: Common YAML Errors
Validate YAML online free — catch tabs, duplicate keys and type-coercion bugs. Why `version: 1.10` becomes 1.1, and what your parser really does. 100% browser-b
API Debugging Tools: The Six Tabs I Open When an Endpoint Lies to Me
The browser tools I actually use to debug APIs — JSON, JWT, Base64, timestamps, diffs. Client-side, no signup. Plus the exp-claim bug that cost me a weekend.
Remove an Image Background in the Browser: What a Color-Key Remover Actually Does
Remove image backgrounds free, in-browser, no uploads. How a color-key remover works, when it beats AI tools, and the tolerance trick for clean edges.
Resize Images Online: The Retina Trap and What Canvas Quietly Throws Away
Resize images online free, in your browser. The 2x rule that fixes blurry uploads, aspect-ratio math that prevents squashing, and what resizing strips from your