How to compress photos to an exact file size
The ultimate, privacy-first tool to reduce image file sizes for US Visas, EU Passports, University applications, and web performance.
Stop guessing with "Quality" sliders
Most online image compressors only offer a basic percentage slider (e.g., 50% quality). If an immigration or employment portal requires your photo to be exactly under 240 KB, a slider leaves you guessing, forcing you to repeatedly compress, download, and check the file size.
GASO Studio uses a smart Binary Search Optimization Engine. You simply type your required limit into the target box. Our engine mathematically tests dozens of compression ratios in the background instantly, delivering the highest possible visual quality that stays perfectly under your limit.
Compressing for US Visas & The Green Card Lottery
The US Department of State has incredibly strict digital file rules for the Diversity Visa (Green Card Lottery), DS-160, and US Passport renewals. Your digital photo must be strictly under 240 KB (240,000 bytes).
Using our engine, you can safely type "239" into the target box. The tool will perfectly compress your high-resolution portrait into a web-ready JPEG without sacrificing the clarity required by facial recognition software at the consulate.
Schengen Visas, UK Passports, and University Portals
Whether you are applying for a Schengen Visa for Europe, a UK Passport, or submitting documents to global university portals like the Common App or UCAS, you will frequently encounter upload limits of 100 KB or 50 KB.
- ID Photos: Easily shrink large iPhone or Android portraits down to 50 KB for application forms.
- Scanned Documents: Compress photos of your ID, driver's license, or signature to meet strict 20 KB to 100 KB thresholds.
100% Private: Your documents never leave your device
Uploading your official passport, driver's license, or personal portraits to a random server on the internet is a massive privacy and identity theft risk.
We built this tool using WebAssembly (WASM). When you drop a photo into GASO Studio, your own computer's CPU handles the compression locally inside your web browser. Your sensitive documents are never uploaded to a cloud server, guaranteeing 100% offline privacy.