Bastardica is a browser-based font foundry that does exactly one thing: it takes two (or more) fonts and stitches their glyphs together into a single OpenType file. You pick a base font, pick a mix-in font, set a stride (every Nth glyph swaps), apply optional scale and offset effects, and download the result. The swap uses OpenType's contextual ligature substitution registered for every script, so browsers enable it by default. The output works anywhere OpenType text is shaped — browsers, Figma, InDesign, print. The tool runs entirely in-browser using Pyodide (CPython compiled to WebAssembly) and fontTools, which means your fonts never leave your machine. This is a meaningful design choice, not just a privacy checkbox — it means Bastardica works offline, avoids licensing landmines around font uploads, and sidesteps the server-cost problem that kills most free creative tools. The interaction model is immediate and tactile. You load two fonts, adjust parameters, and see live-updating sample text. The prime-number tip for strides is a nice touch: when mixing three or more fonts, using primes for each stride minimizes collisions between mix-in fonts. It's a small detail that signals the creator actually uses this tool and understands the edge cases. Bastardica's lineage is explicit and honest. The creator cites Times New Bastard — the infamous font that randomly swaps glyphs between Times New Roman and Arial — and Easy Pete as direct inspirations. Where those were one-off joke fonts, Bastardica generalizes the mechanism into a tool. You bring your own inputs, your own ratios, your own aesthetic intent. The practical value sits in an interesting middle ground. For serious typographic work, this is a sketching tool — a way to quickly prototype hybrid type treatments before committing to a custom typeface. For web designers tired of the same Google Fonts rotation, it's a way to generate something distinctive without commissioning a type designer. For artists and zine-makers, it's just fun. The licensing note is appropriately sober: mixing two fonts creates a derivative work, check both licenses before commercial use. The limitations are honest. This is glyph-level surgery, not bezier-level interpolation — you're swapping whole letterforms, not blending outlines. The results range from surprisingly elegant to deliberately ugly, and the tool doesn't pretend otherwise. The name tells you everything about the aesthetic register. Bastardica is a small, focused tool that does its one thing well, runs where it should (your browser, your machine), and trusts you to figure out what to do with it. That's a higher compliment than it might sound.
