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Guides

Every way to send big files.

Practical guides pulled from real workflows. New ones land here as we write them.

01

How to Send Large Files Online — A Practical 2026 Guide

The complete guide to sending large files (over 1 GB) without upload limits, sign-up, or compromised privacy.

2026-05-13

02

WeTransfer Alternative: When to Choose a Real-Time Relay Instead

A clear, honest comparison between WeTransfer-style upload services and real-time relay tools like File Tunnel.

2026-05-13

03

Send a Single File to Many People at Once Without Cloud Storage

How to broadcast one file to a group — wedding photos, lecture recordings, team builds — using a real-time tunnel.

2026-05-13

04

Move Files Between Your Phone and PC Without Installing Anything

A no-install workflow for shuttling files between phone and computer using only a browser and a QR code.

2026-05-13

05

Secure File Transfer Without Cloud Storage: What "No Storage" Really Means

Privacy-first file transfer explained: how relays work, how data is or is not retained, and what the threat model actually looks like.

2026-05-13

06

How to Resume an Interrupted File Transfer (Without Starting Over)

Chunked streaming, per-chunk acknowledgements, and the File System Access API — how modern transfer tools survive flaky networks.

2026-05-13

07

A Calmer Way to Share API Keys, Passwords, and Other Secrets

Stop pasting credentials into Slack. A short guide to using a real-time, password-protected, auto-expiring channel for one-off secret handoffs.

2026-05-13

08

Why a Memorable Code Beats a Random One for Client Handoffs

Photographers, freelancers, and anyone handing files to non-technical clients — a 3-word code is what makes the difference between "did you get it?" and "yes, opening now."

2026-05-13

09

How TLS Protects a File in Transit — and What It Doesn't

A plain-language guide to what HTTPS/TLS actually guarantees when a file moves over a network — encryption, integrity, server auth — and the gaps it leaves open.

2026-06-23

10

WebRTC, Relays, and P2P: How Files Actually Move Between Browsers

A neutral primer on the three ways a file moves browser-to-browser — cloud upload, server relay, and WebRTC P2P — plus the NAT, STUN, and TURN reality.

2026-06-23

11

EXIF Metadata: What Your Photos Reveal, and What Apps Strip

What hidden EXIF, IPTC, and XMP metadata rides along in your photos, the real GPS privacy risk, and which messengers, social apps, and email keep or strip it.

2026-06-23

12

Encrypt a File Before You Send It: A Practical Guide to age and GPG

Encrypt a file yourself with age or GPG so no transport — email, cloud, relay, P2P — can read it. Commands, symmetric vs asymmetric, and the out-of-band catch.

2026-06-23

13

Understanding the File System Access API

A practical guide to the File System Access API: reading and writing local files from the browser, streaming large files to disk, its security model, and its real 2026 limits.

2026-06-23