Developer & Code Studios
Terser AST code minifiers, ECMAScript regex/glob workbenches, UTF-8/Base64/URL byte inspectors, deterministic SVG diagramming, and cron/IANA timezone planners.
5 unified studios · 100% client-side execution · Zero uploads · No sign-up
Minify JS/CSS/HTML bundles with GZIP wire budgets, debug RegExp and file globs, inspect Base64/URL/UTF-8 bytes, render SVG architecture diagrams, and plan cron schedules.
JS, CSS & HTML Code Studio
Minify, mangle, or beautify JavaScript (via Terser AST), CSS, and HTML in your browser with instant raw, minified, and real GZIP byte-savings comparisons.
Regex & Glob Pattern Studio
Test ECMAScript regular expressions with live capture groups and substitutions, inspect deterministic token-by-token regex explanations, and match .gitignore/bundler glob patterns.
Encoding, URL & Unicode Studio
UTF-8 Base64 & Base64URL encoder/decoder, local file Data URI builder, interactive URL & query-param editor, HTML entity/JSON string escaper, and Unicode/Hex/Binary byte inspector.
Flowchart, Sequence & ER Diagram Studio
Author deterministic Flowcharts, Sequence Diagrams, and Database Entity-Relationship (ER) schemas from clean text DSLs with live SVG layout and high-DPI PNG/SVG export.
Cron, Timestamp & Timezone Studio
Translate 5-field cron schedules into plain English with next 10 IANA runs, convert Unix epoch (s/ms/μs) ↔ ISO 8601, compare global timezone overlaps, and compute business-day deltas.
Common workflows in Developer & Code Studios
AST minification & wire-transfer budgeting
Minify JavaScript with Terser AST dead-code removal alongside CSS/HTML and measure real RFC 1952 GZIP byte sizes.
Pattern matching, codecs & architecture diagrams
Test RegExp capture groups and glob paths, inspect UTF-8 code points, or render Flowchart, Sequence, and ERD syntax into crisp SVG.
Developer & Code Studios — frequently asked questions
- Does Diagram Studio require an external rendering server?
- No. Flowcharts, sequence lifelines, and ERDs compile directly into clean vector SVG in your browser.
Related developer & code studios guides
Collections and guides covering developer & code studios.
- Client-Side Developer & Data StudiosMulti-mode browser studios for JSON/YAML/XML/.env formatting, CSV & SQL schemas, JS Terser minification, RegExp/Glob testing, SVG diagrams, and cron schedules.
- Browser Cryptography & Auth StudiosGenerate CSPRNG passwords, UUID v7, and ULIDs, compute SHA/HMAC file checksums, test bcrypt & AES-256-GCM, and debug JWT, PKCE S256, and TOTP 2FA locally.
Explore all 37 browser studios
37 local-first utilities across 11 categories — free and ready with no sign-up.