FragBin

---
title: "FragBin - Secure, Fast & Markdown-Powered Paste Sharing"
description: "FragBin is a modern privacy-first Pastebin alternative for developers and teams: instant sharing, Markdown + syntax highlighting, password & expiry control, raw endpoints, SEO-friendly pages, and a clean UI."
keywords: ["Pastebin alternative", "secure paste sharing", "Markdown snippets", "share code online", "temporary notes", "raw endpoint", "developer tool", "privacy-first paste"]
---

# FragBin - Modern Secure Paste & Markdown Sharing Platform

## Introduction
FragBin is a fast, privacy‑first alternative to legacy paste services. It lets you create and share code snippets, configuration fragments, technical notes, documentation excerpts, changelog drafts, error logs, and Markdown articles in seconds—without creating an account. Every paste is instantly accessible through a clean permalink, a raw text endpoint perfect for automations, and SEO‑friendly pages that present well when shared on social media.

Designed for developers, engineers, educators, open‑source maintainers, and productivity enthusiasts, FragBin combines frictionless creation with built‑in trust and control. You decide: keep a paste public for discoverability, mark it private to hide it from listings and search feeds, protect it with a password for discreet sharing, or make it self‑expire after an hour, a day, or a week. Need something permanent? Choose “never” and the link stays stable.

Unlike generic tools, FragBin focuses on clarity, speed, and safety: Markdown with GitHub Flavored features for readable documentation; syntax highlighting for multi-language snippets; protected rendering that strips unsafe HTML; copy and raw views optimized for automation pipelines; and lightweight caching with ETag + Last‑Modified so browsers and edge layers revalidate instantly without stale surprises.

Use FragBin to:
- Share reproducible bug reports & stack traces
- Publish temporary API tokens or integration instructions (with short expiry + password)
- Embed raw URLs in CI pipelines, scripts, or AI assistants
- Draft README sections collaboratively
- Host quick internal notes, onboarding guidelines, or code review context

Whether you’re replacing ad-heavy paste sites, enabling ephemeral collaboration, or integrating a stable raw endpoint into automation workflows, FragBin delivers a balance of speed, simplicity, and security that helps teams move faster with less friction.

Important notes:
- Public pastes are accessible via /p/<id> and raw at /raw/<id>.
- Private/pw-protected pastes are not indexable and by default should be treated as user data.

## Why FragBin Over Other Paste Tools?
- Faster creation flow: minimal form, smart defaults, auto title inference.
- Privacy controls built-in (private mode + optional password + scoped expiry).
- Markdown + code highlighting in one unified view (no plugin maze).
- Raw endpoint ideal for scripts, bots, and AI ingestion.
- SEO & social optimized: clean Open Graph, sitemap, robots clarity.
- Secure by design: sanitized rendering, size limits, rate limiting, brute-force protection.
- No account lock-in: edit via a one-time private key.

## Docs
- [API](https://www.fragbin.com/api-docs): API documentation and examples.
- [FAQ](https://www.fragbin.com/faq): Frequently asked questions (security, privacy).
- [Blog](https://fragbin.com/blog): Official blog and tutorials.
 - [API (Markdown mirror)](/api.md)
 - [FAQ (Markdown mirror)](/faq.md)

## Examples
- [Raw paste example](https://www.fragbin.com/api/pastes/raw/WELC) (alias short: https://www.fragbin.com/r/WELC): plain-text access

## Optional
- [Terms of Service](https://www.fragbin.com/legal/terms-of-service)
- [Privacy Policy](https://www.fragbin.com/legal/privacy-policy)
- [Acceptable Use Policy](https://www.fragbin.com/legal/acceptable-use-policy)

---

## Table of Contents
1. [Key Value Proposition](#key-value-proposition)
2. [Feature Set (User-Facing)](#feature-set-user-facing)
3. [Architecture Highlights](#architecture-highlights)
4. [Data Flow Summary](#data-flow-summary)
5. [Edit Key Model](#edit-key-model)
6. [Security Measures](#security-measures)
7. [Expiration Handling](#expiration-handling)
8. [SEO & Discovery](#seo--discovery)
9. [API Reference](#api-reference)
10. [Integration Examples](#integration-examples)
11. [Integration & Automation Ideas](#integration--automation-ideas)
12. [CDN / Edge Readiness](#cdn--edge-readiness)
13. [FAQ](#faq)
14. [Future / Roadmap](#future--roadmap)
15. [Terms of Use](#terms-of-use)
16. [Glossary](#glossary)
17. [Prompting Tips](#prompting-tips)
18. [Contact / Contribution](#contact--contribution)

---

## Key Value Proposition
- **Instant sharing:** Create and share in seconds (web UI, raw URLs, QR).
- **Privacy & control:** Optional password, private mode, enum-based expiration.
- **Developer ergonomics:** Markdown (GFM), syntax highlighting, copy helpers, raw endpoint, language tagging.
- **SEO friendly:** Dynamic metadata, sitemap, robots directives, clean social previews.
- **Performance aware:** Lightweight caching with `ETag` / `Last-Modified` for rapid revalidation.
- **Secure by design:** Sanitized rendering, rate limiting, brute-force mitigation.

## Feature Set (User-Facing)
### 1. Paste Creation
- Optional title (auto-inferred from first line if omitted)
- Language selection: `text`, `javascript`, `typescript`, `python`, `go`, `java`, `c`, `cpp`, `markdown`
- Expiration enum: `never | 1h | 1d | 1w | null` (null = treat as default/never)
- Private toggle (excludes from listings + sitemap)
- Optional password (bcrypt hashed server-side)
- 20KB max content size (client + server validation)
- Edit key (hex) returned on creation; stored in `sessionStorage`

### 2. Viewing & Interaction
- GitHub Flavored Markdown rendering
- Syntax highlighting for code blocks
- Live preview toggle (Write / Live Preview)
- Copy raw content button
- Raw endpoint link: `/api/pastes/raw/:id` (alias: `/r/:id`)