Private, browser-only tools for the small file jobs that should take seconds.

concise.ai9an.com - preview

What it is

Concise is a static utility site for quick media, code, and writing jobs. Every operation happens in the browser: files are never uploaded, stored remotely, or sent to an API.

The core loop is deliberately short:

open a local file → adjust it → export a local download

Features

• image cropping
• image resizing (to maxium size or pixel count)
• file converting, supported formats
• plain-background removal with transparent or green-screen PNG export
• optional local AI matte background removal with a cached, browser-run model
• metadata inspection plus lossless stripping for common images, media, PDF, and office documents
• QR generation with optional centre images
• Base64, URL, hex, cipher, hashing, and AES-256-GCM tools
• Markdown editing with a sanitised live preview and README cheatsheet
• case conversion for prose and developer naming styles
• configurable FIGlet ASCII lettering with shared per-glyph colour fades, transparent still PNG, and executable ANSI animations for Bash/Konsole or Python
• local-first
• fast exports with quality and format controls

Privacy and offline behavior

• No file upload endpoint
• No accounts or server-side storage
• No analytics that receive file content
• No runtime CDN dependency for FFmpeg: the multi-threaded core is copied into the static build and split into two deploy-safe WASM chunks
• Precise background removal downloads its permissively licensed model from Hugging Face on first use; the model is cached and inference remains on-device
• Once the page and its local processing assets are loaded, file work continues without a network connection

Formats

image:

jpeg, png, webp, avif, gif, bmp, tiff

video:

mp4, webm, mov, mkv, avi, gif

audio:

mp3, wav, ogg, flac, m4a

Run or test locally

Requirements: Node.js 20+ and npm.

npm install
npm run dev

Quality checks

npm run typecheck
npm run build

Preview

Project layout

assets/                 Source brand assets
public/ffmpeg-core/     Locally served multi-threaded FFmpeg core files
src/
  lib/ffmpeg.ts         FFmpeg loader and wrapper foundation
  tools/                Media processing and text-codec logic
  ui/                   Editors, generators, navigation, and shared UI
  styles/               Global visual system and utility workspaces
_headers                Cloudflare security and isolation headers
wrangler.jsonc          Workers Static Assets configuration

Contributing

Keep file processing client-side. Do not add upload endpoints, server-side processing, account requirements, or tracking that can access user file content.

Run npm run typecheck and npm run build before opening a pull request.

built with codex and impeccable