Developer & Data
Generators & Ops
Handle generators and lightweight ops tasks
This hub keeps one family of developer and data actions together. Start with the most common inspection or transformation step, then use the rest of the tools as the workflow expands.
Top Tools
Start with the most common entry points.
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ASCII Art Generator
Convert text to ASCII art with 300+ fonts, layout controls, code comment wrapping, and one-click export
Chmod Calculator
Visually calculate Linux/Unix file permissions with setuid/setgid/sticky special bits, common presets, and 3-way octal↔symbolic↔checkbox sync
Nano ID / ULID Generator
Nano ID & ULID unified generator with 6 alphabet presets, collision probability calculator, ULID timestamp decode, UUID↔ULID conversion, Client-side computation
Robots.txt Generator
Generate robots.txt rules, sitemap declarations, and common crawler directives.
Common Tasks
Decide which tool to open first.
All Tools
All tools in this hub.
🎨🔒🆔🤖🛡️🗺️🔑🔗🔢
ASCII Art Generator
Convert text to ASCII art with 300+ fonts, layout controls, code comment wrapping, and one-click export
Chmod Calculator
Visually calculate Linux/Unix file permissions with setuid/setgid/sticky special bits, common presets, and 3-way octal↔symbolic↔checkbox sync
Nano ID / ULID Generator
Nano ID & ULID unified generator with 6 alphabet presets, collision probability calculator, ULID timestamp decode, UUID↔ULID conversion, Client-side computation
Robots.txt Generator
Generate robots.txt rules, sitemap declarations, and common crawler directives.
Shield Badge Generator
Generate static badges with local preview, then copy Shields-compatible URLs, Markdown, HTML, and SVG
Sitemap Generator
Generate XML sitemaps locally from either full URLs or same-site paths, with optional changefreq, priority, and lastmod fields, then copy or download the result.
UUID Generator
Generate UUID v4 in batch with format options
Random MAC Address Generator
Generate random MAC addresses in batch with four formats, case toggle, unicast/multicast & UAA/LAA control, custom OUI prefix, and vendor presets
Sequence Number Generator
Client-side computation batch sequence generator with Simple mode (prefix+start+step+padding+suffix), DSL templates ({n:04} {ALPHA} {ROMAN} {cn} {CN} {date:YYYY-MM-DD} {rand:6}), Date mode, 9 output formats (TXT/CSV/JSON/TSV/SQL/Markdown), BigInt big-number support, fixed-point decimals, Chinese numerals & financial uppercase, Excel column letters, Roman numerals, shuffle, presets, up to 100k rows, mobile-first UI
Related Hubs
Nearby task clusters.