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We built NoStorePDF with a strict local-first architecture. It is the definitive privacy-first alternative to iLovePDF, Smallpdf, PDF24, and Adobe Acrobat Online. No hidden servers, no cloud storage, no compromised privacy.
Unlike traditional PDF editors, your files are never uploaded to any remote server. Every single byte remains on your computer throughout the entire process.
We have no databases storing your sensitive documents. Once you close your browser tab, all temporary local processing data is completely erased.
Powered by next-generation WebAssembly (WASM), we bring enterprise-grade processing logic directly into your browser for instant, secure execution.
Use our free File Size Analyzer directly in your browser. 100% secure, offline-capable, and private. Analyze file sizes and get detailed byte information.
Use our free Batch Rename Preview directly in your browser. 100% secure, offline-capable, and private.
Drag any file into the analysis dropzone.
The tool instantly reads the local filesystem metadata.
See the precise size breakdown in bytes, KB, MB, and GB.
Check if the file meets common web or email constraints.