0 KB Server Load • Direct S3/R2 Streaming • 5-Layer Zero-Overhead Security

The Zero-Server-Bandwidth
File Upload Engine for Next.js

Eliminate server RAM saturation, Vercel payload limits, and expensive bandwidth costs. Direct-to-S3/R2 presigned streaming engineered with a 5-layer defense-in-depth pipeline that protects your stack without compromising upload speed or production efficiency.

$ npm install @axosolaman/secure-next-upload
Try Interactive Sandbox

0 KB

Server Payload Bandwidth

3x–5x

Faster Parallel Uploads

5 Layers

Zero-Overhead Security

100%

GPS / EXIF Sanitized

Interactive 5-Layer Security Sandbox

Select a sample payload to watch how the client Web Worker and server-side magic byte inspector process files in real time.

Layer 1

Web Worker EXIF

Stripping GPS & compressing in background

Waiting...
Layer 2

Presigned Token

Locks Content-Type & 7-char key

Waiting...
Direct Stream

S3 / R2 Direct PUT

0 KB server bandwidth streamed

Waiting...
Layer 4

Magic Byte Check

S3 Range: bytes=0-15 hex scan

Waiting...
Layer 5

Atomic Commit

Prunes old avatar & issues public URL

Waiting...
PIPELINE TELEMETRY & SECURITY LOGS Live Inspector

> Select a test scenario above to execute the 5-layer pipeline...

Engineered for Zero Bandwidth & Unbreakable Security

Everything you need to ship enterprise-grade file uploading without server memory bloat or third-party vendor lock-in.

Zero Server Bandwidth

Files stream directly from the browser to Cloudflare R2 or AWS S3 via presigned PUT URLs. No payload ever touches your Node.js or Vercel server RAM.

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Parallel Concurrency Pool

Upload 20+ images simultaneously with configurable concurrency (concurrency: 4), individual progress trackers, and settled fault tolerance.

🎨

Web Worker EXIF Stripping

Automatically scrubs sensitive GPS coordinates, device serials, and timestamps while resizing images on background browser threads before transfer.

🛡️

16-Byte Magic Byte Check

Validates mathematical file signatures via S3 byte-range reads. Malicious polyglot webshells are purged from storage within milliseconds.

CYBERSECURITY RESEARCH

Vulnerabilities Neutralized at Architecture Level

File upload vulnerabilities are consistently the highest-rewarded bugs on HackerOne ($3,000 to $30,000+). Here is how Secure Next Upload defends your stack:

CWE ID Vulnerability Name Defensive Mitigation Severity Bounty Impact
CWE-434 Unrestricted File Upload 16-byte magic byte scan + presigned token locks + post-upload HeadObject check CRITICAL $3k – $30k+
CWE-200 EXIF / GPS Location Leakage Client-side Web Worker strips all GPS & device metadata before request HIGH $1k – $5k
CWE-22 / 646 Path Traversal & Filename Spoofing Generates random 7-character object keys (aB3_x9Z.ext), discarding user paths CRITICAL $3k – $15k
CWE-400 Denial of Service / OOM Crashes Direct S3 PUT bypasses Node.js memory; zero server RAM saturation on Vercel HIGH $500 – $3k
CWE-79 Stored XSS via SVG/HTML Strict entity MIME constraints & content sanitization HIGH $1k – $5k

How Does It Compare to Alternatives?

See how Secure Next Upload compares with managed SaaS platforms and open-source file handlers.

Feature Secure Next Upload next-upload (TimMikeladze) UploadThing Multer / Server Uploads
Server Bandwidth ✅ Zero (Direct PUT) ✅ Zero (Presigned) ✅ Zero (Direct) ❌ High (Full payload buffers)
16-Byte Magic Byte Check ✅ Built-in (S3 Range: 0-15) ❌ None (MIME header only) ⚠️ Basic verification ⚠️ Requires server buffer
Client Web Worker EXIF Stripping ✅ Built-in (GPS & camera scrub) ❌ None (Raw unstripped files) ❌ None (Manual) ❌ None
Parallel Concurrency Pool ✅ Built-in (concurrency: 3-5) ❌ Sequential / Manual ⚠️ Basic queue ❌ Manual implementation
Atomic Replacement (Avatar swap) ✅ Built-in (Auto-prunes old file) ❌ Manual (Orphan storage bloat) ❌ Manual ❌ Manual
Multi-Entity Registry ✅ Built-in (Type-Safe Registry) ❌ Single upload endpoint ✅ FileRouter ❌ Custom middleware boilerplates
Data Ownership & Pricing 💸 100% Self-Hosted ($0 lock-in) 💸 100% Self-Hosted (S3/R2) 💳 Monthly SaaS Tier 💸 High Server & Bandwidth Costs

Quickstart in 3 Minutes

Copy-paste ready route handlers and React components.

"use client";

import { useFileUpload } from "@axosecurity/secure-next-upload/client";

export function MultiFileGallery() {
  const { uploadMultiple, fileItems, progress, status, isUploading } = useFileUpload({
    entityType: "gallery",
    concurrency: 4, // Upload 4 files in parallel
    onFileSuccess: (res, file) => console.log(`Uploaded ${file.name}:`, res.fileUrl),
  });

  return (
    <div>
      <input 
        type="file" 
        multiple 
        onChange={(e) => e.target.files && uploadMultiple(Array.from(e.target.files))} 
      />
      {isUploading && (
        <div>
          <p>Overall Progress: {progress}% ({status})</p>
          {fileItems.map((item) => (
            <div key={item.id}>{item.file.name}: {item.status} ({item.progress}%)</div>
          ))}
        </div>
      )}
    </div>
  );
}
👨‍💻

Built by Security Researcher axosolaman

Axo Security • Defensive AppSec & Zero-Trust Cloud Architectures

Specializing in web application security, bug bounty vulnerability research, and hardening high-risk cloud storage attack surfaces against real-world RCE, SSRF, and CWE-434 exploit vectors.