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Reduce PDF file sizes under 20MB in seconds. Preserve crisp typography, vector lines, and digital signatures without hitting mail server attachment rejections.
Stateless streaming optimization. File is processed in server memory and purged immediately.
Stateless streaming optimization. File is processed in server memory and purged immediately.
Reduce PDF file sizes under 20MB in seconds. Preserve crisp typography, vector lines, and digital signatures without hitting mail server attachment rejections.
Select or drop your PDF document that exceeds email size limits into the compression workspace.
Keep the pre-selected Balanced preset (JPEG 75% quality) to achieve the sweet spot between document crispness and aggressive byte reduction.
Download your compressed PDF in seconds and attach it directly to Gmail, Outlook, or Apple Mail without delivery bounce-backs.
Major email service providers enforce rigid attachment size thresholds that frequently disrupt professional workflows. Google Gmail caps inbound and outbound attachments at 25MB, while Microsoft Outlook and Microsoft 365 default to a stricter 20MB limit (and frequently bounce files above 10MB on legacy corporate Exchange servers). What makes this worse is MIME email encoding: when a binary PDF is attached to an email, Base64 encoding inflates the transmitted file size by roughly 33 percent. Consequently, an uncompressed 18MB PDF can easily exceed the 25MB ceiling during transmission, triggering immediate delivery failures.
When you attempt to dispatch high-resolution pitch decks, legal contracts with embedded scans, architectural blueprints, or multi-page financial portfolios, your email client will either bounce the message or force you into confusing external cloud drive links that require third-party sign-ins. This introduces unnecessary friction for clients, partners, and recruiters who need to view your documents immediately inside their primary inbox.
FolderBit's email-optimized compression resolves this limitation by intelligently analyzing the internal stream objects of your PDF. Standard desktop tools often downsample entire documents indiscriminately, leaving text blurry, fonts distorted, and digital signatures jagged. Our specialized compression pipeline isolates high-DPI raster graphics and downscales them to 150-200 DPI—the international standard for sharp screen readability—while preserving vector glyphs, embedded fonts, and interactive form fields with zero degradation.
By applying advanced Flate stream compaction and pruning redundant unreferenced color profiles, FolderBit consistently yields file size reductions between 50% and 85%. An unwieldy 45MB scanned presentation is compacted into a lightweight 4MB to 8MB document that passes through any corporate spam filter and arrives safely on both desktop monitors and mobile phone screens.
Furthermore, all operations respect your strict confidentiality. Whether you are sending quarterly earnings, medical disclosures, or sensitive personnel records, your files are processed in ephemeral containers and never retained, sold, or parsed for ad targeting. Experience fast, frictionless document sharing that lands directly in your recipient's inbox without delivery errors or cloud permissions roadblocks.
Easily downsizes 30MB-80MB scanned presentations and PDF agreements below standard 20MB and 25MB mail server thresholds.
Unlike generic compressors that blur text, FolderBit retains sharp vector fonts, tables, and signature stamps.
Compress documents immediately on your workstation or mobile browser with zero account registration required.
Your sensitive business contracts and personal attachments are processed with zero-retention security protocols.
Answers to common questions about email attachment optimization and file security.
Save your compressed documents directly into a shared FolderBit workspace, collect audit-ready e-signatures, and query documents with Gemini AI.