Free · No signup · No limits

Developer Tools for Programmers

Fast, free, and modern online utilities. Format JSON, convert code to PDF, decode JWTs, generate UUIDs, test regex — and much more.

19 tools live · more coming soon

⚡ Instant results
🔒 Nothing stored on servers
🆓 Always free
👤 No account required
🌙 Dark mode

Featured Tool

Our most popular developer utility

📄

Code to PDF Converter

Convert source code to syntax-highlighted PDFs. Supports 50+ languages including JavaScript, Python, Java, Go, Rust, and more. Drag-and-drop multiple files, choose a theme, and download instantly.

JavaScriptPythonTypeScriptGoRust+45 more
Try it Free

All Tools

Every tool runs in your browser — instant, private, free.

📄

PDF Tools

3 live
📄

Code to PDF

Convert source code to PDF with syntax highlighting. Supports Python, JavaScript, Java, Go, Rust, and 45+ more languages. Free online code to PDF converter, no signup required.

📑

Markdown to PDF

Convert Markdown documents to professionally styled PDFs. Preserves headings, code blocks, tables, and lists. Free online Markdown to PDF converter, no account required.

🖨

HTML to PDF

Convert HTML with CSS to a pixel-accurate PDF online. Supports flexbox, tables, Google Fonts, and custom styles. Free online HTML to PDF converter, no signup required.

{}

Formatters

8 live
{}

JSON Formatter

Format, beautify, and indent JSON online instantly. Validates JSON syntax and highlights errors. Free online JSON formatter and beautifier, no account required.

✅

JSON Validator

Validate JSON syntax instantly online. Pinpoints the exact line and column of every error. Free online JSON validator and syntax checker, no signup required.

🔄

JSON Compare

Compare two JSON objects side-by-side online. Highlights added, removed, and changed keys with full dot-notation paths. Free online JSON diff tool, no signup required.

🗄

SQL Formatter

Format and beautify SQL queries online. Supports MySQL, PostgreSQL, SQLite, T-SQL, and BigQuery. Clean indented output instantly. Free SQL formatter, no account needed.

🌐

HTML Formatter

Format and indent HTML markup online for better readability. Beautifies minified HTML instantly with configurable indentation. Free HTML formatter, no signup required.

🎨

CSS Formatter

Format and expand minified CSS stylesheets online. Consistent indentation, readable property formatting. Free CSS formatter and beautifier, no account required.

📝

XML Formatter

Format and indent XML documents online. Validates structure and reports errors. Supports attributes, namespaces, and large files. Free XML formatter, no signup needed.

📋

YAML Formatter

Format YAML and convert between YAML and JSON online. Supports Kubernetes configs, CI/CD pipelines, and Ansible playbooks. Free YAML formatter, no signup required.

🔒

Encoders & Decoders

3 live
🔒

Base64 Encode

Encode any text or data to Base64 format instantly in your browser. Supports standard and URL-safe Base64. Free online Base64 encoder, no account needed.

🔓

Base64 Decode

Decode Base64-encoded strings back to plain text instantly. Handles standard and URL-safe Base64 with error detection. Free online Base64 decoder, no account needed.

🔑

JWT Decoder

Decode and inspect JWT tokens online. View header, payload, expiry, and all claims. Decode-only — nothing sent to server. Free JWT decoder, no signup required.

🔢

Generators

2 live
🔢

UUID Generator

Generate cryptographically secure v4 UUIDs online. Bulk generate up to 100 at a time with one click. Free UUID generator — runs in browser, no account needed.

◼

QR Code Generator

Generate QR codes for any URL, text, or data. Download as PNG or SVG. Customise size, colours, and error correction. Free online QR code generator, no signup needed.

🛠

Utilities

3 live
.*

Regex Tester

Test and debug regular expressions online with live match highlighting. View capture groups and match count in real time. Free online regex tester, no signup required.

⏱

Unix Timestamp Converter

Convert Unix timestamps to human-readable dates and vice versa. Supports seconds and milliseconds, UTC and local time. Free epoch converter online, no signup.

📖

Markdown Preview

Live Markdown preview with GitHub Flavored Markdown. See rendered output side-by-side as you type. Supports tables, code blocks, and task lists. Free, runs in browser.

Why developers use these tools

Instant & Local

Most tools run entirely in your browser. No round-trip to a server means zero latency and full privacy.

Private by Design

We never log your input. For server-side tools like PDF conversion, files are deleted immediately after processing.

🆓

Genuinely Free

No freemium tricks, no credit limits, no paywall. Every tool is completely free, forever.

What is CodeToPDF?

CodeToPDF is a free collection of online developer utilities built for programmers, engineers, and technical teams. Every tool runs instantly — no server round-trips, no data stored on our end, no account required.

Our flagship tool, the Code to PDF Converter, lets you transform source code into beautifully syntax-highlighted PDF documents in seconds. Upload a Python script, a JavaScript module, a Go file, or any of 50+ supported languages — choose a theme like Dracula or Monokai, configure your font and page size, and download a print-ready PDF. Perfect for code reviews, technical documentation, academic submissions, and client deliverables.

Beyond PDF conversion, CodeToPDF offers a growing suite of essential developer tools:

  • →JSON Formatter & Validator — instantly beautify and validate any JSON
  • →JWT Decoder — inspect token claims and expiry 100% client-side
  • →Base64 Encoder / Decoder — encode and decode data in one click
  • →UUID Generator — generate cryptographically secure v4 UUIDs
  • →Regex Tester — live match highlighting with capture groups and flags
  • →SQL Formatter — beautify MySQL, PostgreSQL, SQLite, and T-SQL queries
  • →YAML Formatter — validate YAML and convert between YAML and JSON
  • →Unix Timestamp Converter — convert epoch to date and back instantly

All client-side tools run entirely in your browser using modern Web APIs. Your code, JSON, tokens, and data never leave your device. For server-side tools like PDF conversion, files are permanently and automatically deleted immediately after processing — we enforce a strict zero-retention policy.

Whether you're a software engineer debugging API responses, a DevOps engineer validating Kubernetes YAML, a security researcher decoding JWTs, or a developer preparing code for a technical presentation — CodeToPDF has the tools to make your workflow faster, more private, and completely free.