100KB Extension v1.1.1: Compress & resize files in 0ms directly in Google Chrome
We build secure, privacy-first tools to help you prepare documents for immigration, passport, and government portals worldwide.
100kb.in was built to solve a specific, frustrating problem: resizing and formatting sensitive personal documents (like passports, IDs, and signatures) to meet strict government portal requirements, without compromising privacy. We believe that you shouldn't have to upload your most sensitive identity documents to a remote server just to change a file size or format.
Lead Systems Engineer & Maintainer
West Bengal, India
Abhishek is a systems engineer specializing in WebAssembly compilation, browser-sandboxed graphics pipelines, and zero-server privacy architectures. He created 100kb.in to eliminate the security risk of uploading sensitive identity cards, tax forms, and biometric signatures to untrusted cloud servers just to meet restrictive government portal upload limits.
Every document guideline, image dimension constraint, and file size requirement published on 100kb.in is manually audited directly from official government gazettes, immigration brochures, and recruitment notification portals (including USCIS, UKVI, IRCC, UPSC, SSC, and NSDL). When application requirements change, our engineering team immediately updates the client-side presets and validation matrices.
Unlike conventional online PDF and photo converters that upload your confidential files to remote cloud storage or third-party servers, 100kb.in executes 100% of compression, image resizing, and PDF restructuring inside your device's browser memory sandbox using WebAssembly and HTML5 Canvas. Your documents, signatures, and biometric photos never leave your device.
Our tools utilize WebAssembly (Wasm) and native browser APIs to process your files entirely on your device. Your photos and PDFs never leave your browser, ensuring absolute privacy and zero risk of data interception.
Our guidelines are researched directly from official government portals (USCIS, UKVI, IRCC, etc.). We constantly monitor for updates to ensure our tools crop, resize, and compress to the exact DPI and byte limits required.
Because files are never uploaded, there is no database to hack and no files to delete. Once you close the tab, all processed data is instantly wiped from your browser's memory.
We leverage open-source, battle-tested libraries (like FFmpeg.wasm and PDF-lib) to power our tools. This transparent approach ensures security through community-audited codebases.
100kb.in operates as an independent technical utility developed and maintained in West Bengal, India. For technical questions, bug reports, portal guideline corrections, or developer licensing inquiries, contact us directly at info@100kb.in. We review all technical queries within 24–48 hours.