About QuickCoderHub

QuickCoderHub is a collection of fast, zero-dependency, browser-based utilities built for software engineers, systems programmers, and competitive coders.

What you'll find here

An uncluttered suite of 63 single-purpose engineering utilities across six core categories:

• PDF & Documents (29): Merge PDF (multi-file combiner), Split PDF (range & burst splitter), Remove PDF Pages (interactive visual page deleter), Extract PDF Pages (visual page extractor & ZIP builder), Organize PDF (drag-and-drop page reorder & rotate), Scan to PDF (webcam/camera capture with Otsu thresholding), Rotate PDF (permanent 90°/180° orientation adjust), Add Page Numbers (vector Bates stamping & pagination), Add Watermark (confidential text & logo stamper), Crop PDF (visual /CropBox margin trimmer), JPG to PDF (multi-image photo combiner), PDF to JPG & PNG (high-res 300 DPI rasterizer & ZIP export), Sign PDF (electronic signature drawing & placement), Edit PDF (text boxes, vector pen, highlighters & shapes), Redact PDF (destructive pixel blackout & metadata stripper), PDF Forms (interactive AcroForm filler & flattener), Compare PDF (visual pixel difference heatmap & text diff), PDF to Markdown (clean GFM parser with heading and table detection), HTML to PDF (vector print generator with real-time preview), PDF to Word (native ECMA-376 .docx converter with paragraph healing), PDF to Excel (smart spatial table extractor to .xlsx & CSV), Compress PDF (smart raster downsampler & xref compactor), PDF to PDF/A (ISO 19005 archival converter with XMP metadata & sRGB OutputIntents), Protect PDF (128-bit encryption with user/owner passwords and granular permission bitmasks), Unlock PDF (password & permission restriction remover with clean re-serialization), Repair PDF (raw binary offset scanner & xref table reconstructor), OCR PDF (WebAssembly optical character recognition with multi-language neural models), AI PDF Summarizer (in-browser document intelligence with window.ai & TextRank), and Translate PDF (side-by-side bilingual reader into 50+ languages).
• Data & Files: Universal Archive Streaming Peeker (open multi-GB ZIP and TAR files without full extraction), JSON Formatter & Validator (with YAML/CSV converter), Semantic JSON Diff & Structure Comparison, SQL Formatter & Beautifier, Color Converter & CSS Generator (HEX, RGB, HSL, OKLCH, gradients, box-shadows), String Case Converter & Slugifier, and String Escape / Unescape (JSON, HTML, URL, Regex, SQL).
• Encoding & Cryptography: Base64 Encoder/Decoder & Image-to-Base64, JWT Decoder & Inspector (claims and expiration), UUID / GUID Generator (v4 Web Crypto bulk generator), Hash Generator (MD5, SHA-1, SHA-256, SHA-512), and Dedicated HMAC Generator & Signature Verifier.
• Web & Networking: URL Encoder & Decoder, URL & Query String Parser (to Table & JSON), Cron Expression Explainer & Next Run Calculator, IPv4 Subnet/CIDR & Linux Chmod Calculator, and Custom QR Code Generator (URL, WiFi, SVG/PNG).
• Development & Media Utilities: Neural Stem Isolator & Vocal Remover (separate acapella vocals, instrumental stems, and subtract background noise), Local Audio Transcriber & Subtitle Generator (in-browser VAD sentence segmentation and SRT/VTT subtitle creation), Real-Time 3D LUT Color Grader (apply .cube LUTs, film grain, and color grade in-browser with WebGL 2.0), Gamepad Tester & Stick Drift Benchmark (1000Hz polling rate and circularity analysis), Instant Lossless Video Cutter (sub-second trimming with zero re-encoding), Screen & Cam Studio (4K/1080p client-side capture with webcam PiP and mixed audio), Visual Text & Code Diff Checker, Regex Tester & Debugger (live match highlights and capture groups), Contest Test Case Parser (Codeforces, AtCoder), and World Timezone Converter & Meeting Planner.
• Systems & Hardware: In-Browser 3D Print Slicer (slice STL models and generate Marlin/Klipper G-Code toolpaths), 3D Mesh Healer & Watertight Repair (detect non-manifold geometry, stitch boundary holes, and unify normals), WebSerial Flasher & Serial Terminal (browser-based ESP32/Pico programmer and live 115200 baud console), Base Converter & Bitwise Calculator, Modern C++ CMakeLists.txt & Presets Generator, IEEE 754 Floating-Point Bit Visualizer (32-bit & 64-bit), and Unix Timestamp Converter & Epoch Calculator.

Who runs it

This site is run by Rohit Chauhan. It is a personal project dedicated to creating lightweight, privacy-focused developer utilities that run entirely client-side.

The tech

The Site is delivered through Cloudflare at the edge, with DNS, caching, and security handled by Cloudflare. All developer utilities run client-side in your browser.

Get in touch

Questions or feedback? Head to the Contact page or email rchauhaan01@gmail.com.