Super ToolKit – MP4 to MP3, PDF & Audio Suite

Private in-browser tools: MP4 to MP3 converter, Audio Trimmer, PDF Merge & Split, Image Compressor, and 45+ utilities. No uploads.

Super ToolKit gives you instant access to 45+ audio, video, PDF, image, and developer converters right from your Chrome toolbar. Unlike traditional cloud converters (Convertio, CloudConvert, Zamzar) that upload your private files to remote servers with strict 50 MB limits, Super ToolKit processes your files 100% locally on your computer using high-performance WebAssembly. Your files never touch a server, and there are no file size restrictions. CORE UTILITIES AT YOUR FINGERTIPS: 🎵 Audio & Video Tools: • Video to Audio Converter: Extract high-bitrate MP3, WAV, AAC, and FLAC from MP4, WebM, and MKV. • Audio Trimmer & Waveform Cutter: Precise start/end trimming with visual audio waveforms. • Audio Reverser & Backward FX: Reverse songs, speech, or sound effects locally. • Vocal Remover & Karaoke Studio: Center-channel vocal isolation and stem separation. • Dolby Spatial Audio Enhancer: 3D soundstage widening, vocal presence, and sub-bass enhancement. • Pitch & Tempo Shifter: Adjust musical pitch and playback speed independently without distortion. • BPM & Tap Tempo Detector: Real-time rhythmic tempo calculation. 📄 PDF Suite: • PDF Merger & Combiner: Merge unlimited PDF documents with page reordering. • PDF Page Splitter: Extract individual pages or custom ranges. • PDF Password Studio: Encrypt with AES security or remove passwords. • PDF to Word / Text: Extract clean text and documents without server uploads. • Flatten PDF Forms: Lock interactive form fields and signatures permanently. 🖼️ Image & Vector Studio: • Image Compressor: Reduce WebP, PNG, and JPEG file sizes by up to 90% without visible quality loss. • Batch Image Converter: Convert between WebP, PNG, JPEG, and AVIF with custom dimensions. • SVG to PNG Converter: Render crisp vector artwork at custom DPI scales. 💻 Developer & Everyday Utilities: • QR Code Studio: Generate high-resolution, custom-styled QR codes with zero tracking. • Base64 Encoder / Decoder: Convert images and files to base64 data URIs. • Word Counter & Case Converter: Real-time character counts, reading time, and case transformations. • JSON Cleaner & Formatter: Validate, prettify, and minify complex JSON schemas. • CSV ⇄ JSON Converter: Bidirectional data conversion. • Hash & Checksum Studio: Verify file integrity with SHA-256, SHA-512, and MD5 hashes. BROWSER INTEGRATION & SHORTCUTS: • Address Bar Omnibox: Type "stk" followed by a space and your tool name (e.g. "stk mp4") in your address bar to jump straight to any tool. • Right-Click Menu: Right-click any media or link to open it in Super ToolKit. • Keyboard Shortcut: Press Ctrl+Shift+K (Command+Shift+K on Mac) to open the launcher. 100% PRIVATE & OFFLINE: • Zero file uploads: files remain in your local browser memory. • Works completely offline once loaded. • No account creation, no subscriptions, no ads.