Premium
Engines.
Hand-picked tools optimized for production-grade speed and reliability.
UI Replication QA
Validate a reimplemented site against its source and specification — theme, layout, hover, and interaction states.
Asset & UI Extractor
The ultimate site-to-code utility. Extract SVGs, brand colors, and fonts from any URL for free.
{ "id": 2, "name": "User_84", "status": "pending" }
Synthetic Data Factory
Generate diverse, high-quality synthetic training data (JSONL & CSV) for fine-tuning LLMs and AI agents.
Resume Studio
Build an ATS-friendly, professional resume with a live split-pane editor and instant PDF export.
Newsletter Generator
Build send-ready HTML newsletters with subject, preheader, section editor, and copy-paste export.
Vulnerability Scanner
Scan your website for common security vulnerabilities and get instant fixes.
Marketing & SEO
Keyword Research Tool
Discover long-tail keywords and suggestions for SEO and content marketing.
SEO Audit Tool
Get a detailed analysis of your on-page SEO, with recommendations to improve your ranking.
UTM Link Builder
Tag campaign URLs with UTM source, medium, and campaign for Google Analytics — private, in-browser.
Schema Generator
Generate JSON-LD schema for FAQs, organizations, and breadcrumbs to improve SEO.
Design & Media
Image Compressor
Compress JPEG, PNG, WebP, and AVIF in the browser. Compare before/after, resize, hit a target size, download a ZIP.
Video Background Studio
Record video with a virtual background. Remove, replace, or blur your background in real-time.
Video Collage Maker
Browser video collage editor with crop, aspect ratios, timeline trim, text overlays, and WebM/MP4 export.
Business Card Generator
Two-sided print cards in the browser. US, EU, and square sizes, original layouts, QR vCard, 300 DPI PNG, ZIP, and PDF.
QR Code Generator
Wi-Fi, vCard, URL, and more. Style colors and a logo, download PNG or SVG. Private, in the browser.
CSS Gradient Generator
Design linear, radial, conic, and mesh CSS gradients with a live preview, then copy CSS, Tailwind, or export PNG — private, in the browser.
Color Palette Generator
Generate palettes with harmony rules, lock and reorder, WCAG contrast, image extract, and CSS/Tailwind export — private in the browser.
Favicon Generator
Create a favicon pack (ICO, PNG, Apple Touch, Android, PSD, webmanifest) from one image — private and free.
OG Image Generator
Design 1200×630 Open Graph images, preview Slack/LinkedIn/X, download PNG, copy HTML or Next.js tags.
Code & DevOps
SVG Shape Generator
Create unique, organic SVG blob shapes with configurable properties.
JSON Formatter
Format, minify, and validate JSON in the browser — tree view, sort keys, copy or download. Private, no upload.
CSS Animation Builder
Generate @keyframes and copy-paste CSS in the browser. Presets, custom timeline, live preview.
UI Component Gallery
Full React + Tailwind catalog with live previews, copy-paste code, and AI prompts. Charts, AI chat, forms, and more — no kit install.
Scroll Animation Generator
Generate scroll-triggered CSS: fade, parallax, stacked cards, path draw. Copy CSS, JS, HTML, or an AI prompt.
Font Pairing Previewer
Preview Google Font pairings with live layouts, spacing controls, and CSS/Tailwind export.
API Response Mocker
Mock JSON from a schema, example, or TypeScript interface. Preview status and headers, copy fetch or curl.
Cron Job Generator
A user-friendly way to build and validate cron job expressions.
.env Validator
Compare .env and .env.example files to find missing or extra variables.
Docker Command Helper
Build docker run commands and docker-compose.yml in the browser, then copy them.
Git Branch Name Generator
Generate conventional git branch names from a type, optional Jira ticket, and a short description — copy git checkout -b in one click.
Game Development
Game Design Doc Generator
Structure your game ideas into a professional GDD and export it as Markdown.
Sprite Sheet Generator
Pack animation frames into a single sprite sheet with a JSON data file.
Retro SFX Generator
Generate 8-bit style sound effects (coins, jumps, explosions) and export as WAV.
2D Procedural Level Generator
Seeded dungeon and platformer maps. Export Tiled TMX for Unity, Godot scenes, Phaser JSON, or importer scripts.
RPG Economy / XP Balancer
Visualize and balance level-up curves, gold drops, and stat progression models.
Auto Hitbox Generator
Trace a sprite silhouette into Godot CollisionPolygon2D / Unity PolygonCollider2D exports.
Loot Table Simulator
Monte Carlo drop-rate simulation with rarity distributions and engine-ready exports.
Why Jaconir?
Built for speed, privacy, and absolute simplicity.
100% Free Forever
No sign-ups, no watermarks, no feature limits. Every tool is completely free for any purpose.
Privacy Architecture
All tools run client-side. Your data is processed in your browser and never reaches our servers.
Production Grade
We focus on high-fidelity, intuitive interfaces that solve real developer problems without friction.