Generator for Developer
78 generator tools hand-picked for Developer.
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API Key Generator
Generate cryptographically random API keys and secret tokens with a custom prefix, length, and charset, with a live entropy readout, entirely in your browser.
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ASCII Art Generator
Generate ASCII art from text — figlet-style banners, multiple fonts.
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Avatar Generator
Generate avatars from initials, identicons, or random shapes. Download PNG/SVG.
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Backup Codes Generator
Generate 2FA backup and recovery codes the GitHub way, formatted, unique, and made in your browser
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Barcode Generator
Code 128 / EAN-13 / UPC-A / Code 39 — generate scannable 1D barcodes, export SVG or PNG, fully offline.
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Batch File Rename Planner
Upload a batch, generate safe new filenames with sequence numbers and case rules, then export a CSV plan.
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BEM Class Name Generator
Build block__element--modifier the right way, normalized to kebab-case, with HTML and SCSS nesting examples, browser-only
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CSS Box Shadow Generator
Visual CSS box-shadow builder — multi-layer, inset, color/blur with live preview.
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Cache-Control Builder
Tick the directives, set the lifetime, copy a correct Cache-Control header plus Nginx and Apache lines
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CSS Clip-Path Generator
Visual CSS clip-path builder — polygon, circle, ellipse, inset with drag handles.
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Conventional Commit Generator
Build a spec-perfect commit line from a type, scope, and one-line summary, with live validation and footers
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CORS Header Generator
Pick an origin, methods and headers, get Access-Control-* response headers as a raw list, Nginx, Apache or Express code
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Cover Letter Generator
Cover letter generator — fill 6 fields, pick a tone, get a tailored cover letter in 4 templates, bilingual.
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Test Credit Card Number Generator
Luhn-valid fake card numbers for payment-integration testing — Visa, Mastercard, Amex, Discover, JCB, Diners — non-real, sandbox-only — browser-side
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CSP Generator
Build a Content-Security-Policy from directive toggles, get the header line, meta tag and Nginx snippet, with live unsafe-inline warnings, browser-only
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CSS clamp() Fluid Typography Generator
CSS clamp() fluid typography generator — min/max font size, viewport range, full type scale (h1-h6 + body), copy CSS / Tailwind.
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CSS Cubic Bezier Generator
Drag two handles, read the cubic-bezier() — five built-in presets, motion preview, solve y for any progress, browser-only
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CSS Font Stack Generator
CSS font stack generator — system-safe font families with full Win/Mac/Linux/Android/iOS fallback chains, with CJK fallbacks, copy as CSS/Tailwind/SwiftUI.
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CSS Grid Visual Generator
CSS grid visual generator — drag to set columns/rows, place grid-area named regions, copy ready CSS + HTML, with 12 layout templates.
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CSS Line Clamp Generator
Truncate text after N lines with a trailing ellipsis, copy the CSS and the Tailwind class, with live preview, browser-only
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CSS Loaders Generator
CSS loaders — 40+ pure-CSS spinners/skeletons, customize color/size/speed, copy ready-to-use code.
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CSS Shadow Generator Pro
CSS shadow generator pro — multi-layer box-shadow + text-shadow + filter:drop-shadow, with Material/Tailwind/Apple shadow presets and dark-mode preview.
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CSS Text Shadow Generator
Visual CSS text-shadow builder — multi-layer, color, blur with live preview and shareable links.
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Cubic Bezier Editor
CSS cubic-bezier editor — drag two control points, preview live with bouncing ball + scaling box + opacity fade, copy CSS / JS / Framer Motion / GSAP / SVG path.
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Diceware Passphrase Generator
Cryptographically secure word-based passphrases — pick word count, separator, casing; live entropy; 100% in-browser, never in the URL.
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Email Signature Generator
Fill in your details, pick a template, get table-based inline-style HTML that pastes cleanly into Gmail and Outlook — 100% browser-only
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Favicon Generator
Generate favicon set — text or upload, output 16x16 / 32x32 / 180x180 / 512x512 PNG.
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Figlet ASCII Banner Generator
Turn a short word into a big ASCII letter banner with three built-in fonts, all in your browser
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Font File Inspector
Upload TTF or OTF files and extract family names, PostScript names, version, units per em, glyph count, and table list.
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GitHub README Badge Generator
GitHub README badge generator — shields.io-style badges, 50+ presets (build/version/license/coverage/etc), custom labels, copy as Markdown/HTML/AsciiDoc/RST.
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Glassmorphism Generator
Glassmorphism CSS generator — backdrop-filter blur + transparency + border, live preview with 8 background presets, copy CSS/Tailwind/SwiftUI.
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CSS Gradient Generator
Visual CSS gradient builder — linear, radial, conic with multi-stop colors, live preview, copy CSS, PNG export.
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Hreflang Tag Generator
Paste lang|url pairs, get hreflang link tags, HTTP Link header and sitemap XML with x-default and code validation, browser-only
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.htaccess Generator
Generate Apache .htaccess — HTTPS redirect, www toggle, gzip, cache headers, hotlink protection.
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HTML Table Generator
Build an HTML table visually — rows/columns, header cells, alignment, borders, zebra stripes, paste CSV/TSV — copy clean markup, browser-only
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Google Fonts CSS2 URL Builder
Parse, edit, and generate Google Fonts CSS2 links, HTML preconnect tags, @import CSS, variables, and Tailwind font stacks.
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Image Compressor (Local)
Image compressor — squeeze JPG/PNG/WebP without server upload, with quality slider, batch mode, file size comparison.
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Image Format Converter
Image format converter — JPG ↔ PNG ↔ WebP ↔ AVIF, batch + transparent background handling, 100% client-side.
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Image Resizer
Image resizer — resize JPG/PNG/WebP by pixels/%/preset, fully client-side, no upload.
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Image to ASCII Art
Image to ASCII art — convert any image to text-based art with adjustable density and character set.
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Interview Questions Bank
Interview questions bank — 300+ real questions across behavioral / technical / case / culture, with strong answer frameworks.
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JSON-LD Schema Generator
Build valid schema.org JSON-LD for Article, Product, FAQ, LocalBusiness, Event and more, copy the script tag, drop it in your head
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JSON Schema Generator
Paste a JSON sample, get a typed JSON Schema (draft-07 or 2020-12) in your browser
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Open Source License Generator
Pick MIT, Apache, BSD, GPL and 4 more, fill in your name and year, get a ready-to-save LICENSE file. Browser-only.
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Lorem Ipsum Generator
Classic Lorem Ipsum filler text — paragraphs, sentences, or words — copy in one click, browser-only
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MAC Address Generator
Random MAC addresses in colon, hyphen, Cisco dotted or bare hex, with locally-administered and unicast bits and optional vendor OUI, all in your browser
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Mailto Link Generator
Build a mailto link with recipients, cc, bcc, subject and a multi-line body. Correct URL encoding, copy as plain URL or HTML anchor, all in your browser.
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Markdown TOC Generator
Markdown TOC generator — paste your markdown, get a clean table of contents with anchor links.
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Meta Tag Generator
Generate SEO meta tags — title, description, Open Graph, Twitter Card, Schema.org.
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Mock Data Generator
Generate realistic mock JSON / CSV / SQL data — names, emails, dates, addresses, nested objects.
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MongoDB ObjectId Generator & Decoder
Generate ObjectIds, decode the embedded timestamp, build $gte/$lte bounds for a time range — all in your browser
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Multicultural Name Generator
Random names from 11 cultures — Chinese, English, Japanese, Korean, Arabic, Russian + 5 European.
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NanoID Generator
Generate URL-safe NanoIDs with a custom alphabet, adjustable length, and a live collision-probability readout — entirely in your browser.
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Neumorphism Generator
Neumorphism CSS generator — soft-UI inset/outset shadow pair, live light-source direction, 12 presets, copy CSS/Tailwind/SwiftUI.
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Number Sequence Generator
Generate a list of numbers from start to end by step or count, with zero-padding, prefix, suffix and any separator, all in your browser
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Open Graph & Social Card Preview
See your og:title, og:image and twitter:card exactly as Google, X, Facebook, LinkedIn, Slack and Discord will render them — before you ship.
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otpauth URI Generator
Build an otpauth:// 2FA setup URI from issuer, account and Base32 secret, parse one back, then turn it into a QR code, browser-only
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Password Generator
Generate strong, cryptographically random passwords and passphrases — entirely in your browser.
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Password Leak Checker
Password leak checker — check if your password has been seen in known breaches using k-anonymity (HIBP API style), the password never leaves your browser.
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PDF Merger
PDF merger — combine multiple PDFs into one, drag to reorder pages, 100% client-side with pdf-lib.
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PDF Splitter
PDF splitter — extract pages or split by range, every page becomes a PDF, 100% client-side with pdf-lib.
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Placeholder Image Generator
Generate placeholder images instantly — size, color, text, PNG/JPG/WebP.
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Prompt Template Library
200+ prompt templates for ChatGPT, Claude, Gemini — copy-paste, browse by use case.
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QR Code Decoder
QR code decoder — drag a QR image or paste URL, see the text/URL inside, plus phishing & risky-link warnings.
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QR Code Generator
Generate QR codes from text, URL, WiFi or vCard — customize color and size, download as PNG or SVG.
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Regex Builder from Examples
Regex from examples — paste positive matches + negative non-matches, get a regex that hits all positives and rejects all negatives, with multiple candidate patterns ranked by specificity.
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Regex Visualizer
Regex visualizer — see your pattern as a railroad diagram + matching state machine, with capture groups highlighted.
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Resume Template Builder
Resume template builder — fill a form, get a clean PDF resume in 3 templates (modern / classic / minimal), bilingual.
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robots.txt Generator
Generate robots.txt with templates for common crawlers (Google, Bing, AI scrapers).
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System Prompt Builder
Turn role, task, constraints, and output rules into a structured system prompt you can copy.
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Twitter Card Generator
Build twitter:card meta tags for X with a live card preview, Open Graph fallback and one-click copy, all in your browser
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Typing Speed Test
Typing speed test — WPM, accuracy, real-time mistakes, English + Chinese pinyin modes.
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ULID Generator
Sortable, URL-safe unique IDs — batch generate, monotonic mode, decode the timestamp back out — 100% in your browser
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UTM Link Builder
UTM link builder — track campaign source, medium, name. GA4/Google Analytics compatible.
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UUID Generator
Generate v4 random, v7 time-ordered, NIL, and Short UUIDs instantly — entirely in your browser.
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UUIDv5 Generator
Namespace UUID from a name via SHA-1 — deterministic, RFC 4122, browser-only
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UUIDv7 Generator
Time-ordered, sortable UUIDs by RFC 9562: batch generate, monotonic mode, decode the embedded timestamp, all in your browser
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WiFi QR Code Generator
Turn your WiFi name + password into a scan-to-connect QR code — WPA/WPA2/WPA3, WEP or open, hidden networks, PNG/SVG export. Password never leaves the tab.