Open-source free meme generator, friendly for AI agents and humans

A free, open-source meme generator running entirely on Cloudflare Workers launched with an in-browser editor covering 450+ templates and a URL-based API that renders memes on the fly via GET /images/{template}/{top}/{bottom}.png. The serverless TypeScript Worker uses WASM image codecs and static assets at the edge, and includes an /agents page plus /llms.txt guide for AI agents alongside server-rendered template pages with structured data and a sitemap. The project requires no signup, no origin server, and no image storage, and supports PNG, JPG, animated GIF, and WebP output.

A free meme generator that runs entirely on Cloudflare Workers https://workers.cloudflare.com : an in-browser editor for 450+ templates, plus a URL-based API where every meme is just a link. - Editor pages : one page per template with draggable, individually styled text boxes, your own image layers, custom backgrounds, undo/redo, and PNG/JPG export. No signup, no server round-trips while you edit. - Meme API : GET /images/{template}/{top}/{bottom}.png renders a meme on the fly, with fonts, colors, styles, overlays, custom backgrounds, and animated GIF/WebP output. Interactive docs live at /docs . - Built for search : every template page is server-rendered with a description of the meme, alternate names, tags, structured data, social cards, and a sitemap. - Serverless : TypeScript Worker, WASM image codecs, static assets at the edge. No origin server, no image storage, nothing to babysit. GET /images/buzz/memes/memes everywhere.png GET /images/ds/small file/high quality.jpg?style=maga&width=800 GET /images/oprah/you get/animated text.gif POST /images {"template id": "fry", "text": "not sure if", "or just" } Every template has a human-facing, SEO-friendly editor page rendered by src/views/editor.ts : | Route | Purpose | |---|---| | / | Index of all templates with search /?q= also works server-side | | /memes/{slug} | Canvas editor for one template name-based; old ids and slugs redirect | | /agents , /llms.txt | Guide for AI agents, as a page and as raw markdown src/docs/agents.ts | | /privacy | What the site collects src/views/privacy.ts ; update it when that changes | | /sitemap.xml | Lists the index and every editor page | | /robots.txt | Allows crawling of the pages, disallows the JSON API paths, links the sitemap | | /static/ | Stylesheet and scripts assets/static/ , cache-busted with ?v=<version | | /assets/templates/{id}/{f} | Raw template images used by the editor canvas | | /assets/fonts/{file} | Font files loaded by the editor with the FontFace API | | /proxy/image?url= | Fetches a remote image 10 MB max, images only so the canvas can use it | The editor assets/static/editor.js runs entirely in the browser, imgflip-style: - Text boxes start where the template defines them; drag to move, corner handles to resize, top handle to rotate Shift snaps to 15° , arrow keys to nudge. - Every text box has its own font, size automatic fit or manual , color, outline color and width, alignment, vertical alignment, case, opacity and rotation. - Add as many text boxes as you like, add your own images as layers upload or URL, with flip and opacity , reorder and duplicate layers, and replace the background with an uploaded image or a blank canvas of any size. Alternate template styles are selectable. - Undo/redo Ctrl+Z / Ctrl+Y , delete key, double-click a box to edit its text. - Export as PNG or JPG at full resolution, copy the image to the clipboard, or copy an editor link that restores the text layers the state lives in the URL hash . Each page is server-rendered with a unique title, meta description, canonical URL, Open Graph and Twitter Card tags the example meme is the social image , JSON-LD WebSite with SearchAction , WebPage , ImageObject , BreadcrumbList , an <h1 , descriptive copy, the template's source link, keyword links, and related templates. Without JavaScript a <noscript form posts to POST /images instead. The site name in titles and social cards comes from the SITE NAME variable. The site is installable: /manifest.webmanifest icons generated by npx tsx scripts/build-icons.ts into assets/static/icons/ , a service worker at /sw.js assets/static/sw.js , its cache name bound to the asset content hash so every deploy refreshes caches , and an /offline fallback page. The worker serves pages network-first with an offline fallback, and caches static assets, fonts, template images, and the last 80 rendered memes cache-first. On phones, assets/static/pwa.js shows a closeable "Install" banner: Chrome/Android use the native prompt, iOS gets "Share → Add to Home Screen" instructions; dismissal is remembered for 14 days and the banner never shows once the app is installed. Every template page explains what the meme is, where it comes from, its alternate names, and related tags, so people can find a template by describing it rather than knowing its name. The search on / and ?q= matches names, aliases, keywords, tags, example text, and the description; multi-word queries require every word to match. - data/descriptions.json is fetched from each template's Know Your Meme entry by npm run fetch:descriptions short About/Origin excerpts, tags, alternate names . It only refetches missing or failed entries; pass --force to refresh everything. - data/descriptions.manual.json holds hand-written entries for templates without a Know Your Meme source; these override fetched data. Add an entry here for any new template. - scripts/build-templates.ts merges both into the manifest and warns about templates that still lack a description. Know Your Meme excerpts are short, attributed, and linked; write original copy in the manual file when you want fully unique page text. Requirements: Node 20+, a Cloudflare account for deployment. npm install npm run dev http://localhost:8787 runs the template build first npm test vitest inside the Workers runtime npm run typecheck npm run deploy wrangler deploy uploads the Worker + ~90 MB of template assets Cloudflare's free plan limits Workers to 10 ms of CPU per request, which is not enough to render images. Deploy on the Workers Paid plan; wrangler.jsonc sets a 30 s CPU limit. Variables are defined in wrangler.jsonc vars . Secrets go through wrangler secret put or a local .dev.vars file see .dev.vars.example . | Variable | Purpose | |---|---| | SITE NAME | Name used on the web pages and social cards Memegenscript | | DEBUG | "true" draws text/overlay boxes, enables /test , disables caching | | DOMAIN | Host used in absolute URLs defaults to the request's own origin | | DEFAULT STATIC EXTENSION | Extension used when none is requested png | | DEFAULT ANIMATED EXTENSION | Extension for animated templates gif | | CACHE TTL | Seconds to keep rendered images in the edge cache 0 disables | | REMOTE TRACKING URL | Optional memecomplete backend for API keys, tokens, search, tracking | | REMOTE TRACKING ERRORS LIMIT | Errors before request tracking turns itself off 10 | The API began as a TypeScript port of memegen https://github.com/jacebrowning/memegen Python , whose template library it still uses; the editor, pages, search, and design are original. The table shows what replaced each Python-era dependency: | Concern | Originally memegen, Python | Memegenscript | |---|---|---| | HTTP | Sanic | Worker fetch handler + ordered regex router src/router.ts | | Template metadata | templates/ /config.yml via datafiles | Same YAML, compiled to src/generated/templates.json at build | | Template images, fonts | Local filesystem | Workers Static Assets assets/ , read via the ASSETS binding | | Text measurement & glyphs | Pillow + FreeType | opentype.js src/images/layout.ts | | Rasterizing text/overlays | Pillow ImageDraw | SVG built in src/images/layer.ts , rendered by resvg wasm | | Resize, blur, compositing | Pillow | Pure TypeScript src/images/raster.ts | | PNG / JPEG / WebP codecs | Pillow, webp | jSquash wasm codecs | | GIF | Pillow | gifuct-js decode + gifenc encode | | Animated WebP | webp package | Per-frame encode + hand-written ANMF muxer src/images/webp.ts | | Emoji | emoji + pilmoji Twemoji | emojilib aliases + Twemoji images src/utils/emoji.ts | | style: mock text | spongemock seeded random | MT19937 port with CPython seeding src/utils/mt19937.ts | | Rendered image cache | images/ directory on disk | Cache API caches.default , keyed by request URL | | Custom backgrounds/overlays | Downloaded to templates/ custom-<sha1 / | Downloaded on demand, cached with the Cache API | Request flow for GET /images/{template}/{text}.{ext} : 1. src/views/images.ts normalizes the slug and handles redirects style, watermark, tokens . 2. src/views/helpers.ts renderImageResponse resolves the template, validates every parameter and picks the status code exactly like the Python view. 3. src/images/render.ts decodes the background, resizes it, renders the foreground layer overlays + text once per distinct animation state, pads/watermarks, and encodes. Drop a directory into assets/templates/<id / with a config.yml and a default.png or .jpg / .gif , exactly as in the Python project. Extra images in the directory become style= options. The manifest is rebuilt automatically by npm run dev , npm test and npm run deploy or run npm run build:templates . The full guide lives in docs/guide.md https://github.com/terryds/memegenscript/blob/main/docs/guide.md and the client notes in docs/clients.md https://github.com/terryds/memegenscript/blob/main/docs/clients.md . Everything from the original README applies: - Formats: .png , .jpg , .gif , .webp GIF/WebP animate the text on static backgrounds - width / height both → padded to exact size , layout=top , font=<id|alias - color=<line1 ,<line2 names or hex, optional , style=<name or style=<url ,<url - background=<url with template id=custom , center , scale , frames , start , stop - Special characters in paths: / - → space, → , -- → - , ~q ~a ~p ~h ~s ~b ~l ~g ~n , '' → " - Emoji as characters or :aliases: - Text is rasterized from vector outlines instead of FreeType bitmaps, so glyph shapes and antialiasing differ very slightly; layout, wrapping and font-size selection use the same algorithms and produce the same line breaks. - GIF output is quantized without dithering gifenc , so gradients band a little more. - Hebrew text is laid out left-to-right no bidi shaping , as Pillow does without libraqm. - EXIF orientation of custom JPEG backgrounds is not applied. - Bugsnag error reporting is not wired up; errors go to Workers logs observability is on . - DEBUG mode does not write new template config files to disk there is no disk . - / serves the template index page instead of redirecting to /docs . assets/ templates/, fonts/, static/ served by Workers Static Assets scripts/ build-templates.ts → src/generated/templates.json src/index.ts routes + CORS + error handling src/views/ one module per Sanic blueprint src/models/ Template, Text, Overlay, Font src/images/ codecs, raster ops, text layout, SVG layer, render pipeline src/utils/ slug codec, urls, colors, emoji, remote tracking, sha1, mt19937 src/docs/ OpenAPI document + Swagger UI page test/ vitest runs inside workerd via @cloudflare/vitest-pool-workers MIT. Portions of the API and the template library come from memegen https://github.com/jacebrowning/memegen by Jace Browning MIT ; see LICENSE.txt . Template images belong to their respective owners. Font licenses are in assets/fonts/ . Meme descriptions quote short, attributed excerpts from Know Your Meme.