Xonvert
Xonvert · Tools · Dev

Dev tools — 25 free, in your browser

Developer utilities — JSON, regex, hashing, encoding, cryptography — without sending payloads to a remote API.

Most popular

Base64
Encode and decode Base64 — UTF-8 safe, two-way.
JSON Formatter
Format, minify, and validate JSON. Drag a file or paste a blob.

All dev tools

UUID Generator
Generate UUIDv4 / v7 identifiers in bulk — cryptographically random.
Hash Generator
MD5, SHA-1, SHA-256, SHA-384, SHA-512 — instant cryptographic hashes.
Slug Generator
Turn a title into a clean URL slug — Unicode-safe transliteration.
Lorem Ipsum
Generate placeholder text — words, sentences, or paragraphs.
JSON Minify
Strip whitespace from JSON — smallest valid output.
JSON Validator
Pinpoint syntax errors with line and column — paste and check.
JSON → YAML
Convert JSON to clean YAML with proper indentation.
YAML → JSON
Convert YAML to formatted JSON.
XML Formatter
Pretty-print XML / HTML with proper nesting.
JWT Decoder
Inspect a JSON Web Token — header and payload, decoded.
Hex Viewer
Inspect any file or text as hex bytes with ASCII sidebar.
Password Generator
Strong random passwords with custom length and character sets.
Regex Tester
Live regex matcher — see every match and capture group.
Diff Checker
Compare two pieces of text side-by-side. Line and word diffs.
Bcrypt
Hash a password with bcrypt — or verify a stored hash.
HMAC
Compute HMAC signatures with SHA-256/384/512 or SHA-1.
TOTP Generator
Generate two-factor codes from a base32 secret — live countdown.
SQL Formatter
Pretty-print SQL queries — PostgreSQL, MySQL, SQLite, more.
HTML Formatter
Reflow HTML with consistent indent and tag-aware line breaks.
CSS Formatter
Tidy CSS or SCSS — one declaration per line, consistent indent, no clutter.
JavaScript Formatter
Pretty-print or minify JS/TS — consistent indent, smart line breaks.
Image to Base64
Turn an image into a Base64 data URI — or paste one back to a file.
Encrypt / Decrypt
Password-protect text or any file with AES-256 (GCM) — strong, standard encryption that runs entirely in your browser. Keys never leave your device.

What people do with the dev tools

  • ·Generate hashes (SHA-256/384/512, MD5, BLAKE3) locally
  • ·Decode JWT, base64url, hex without leaking secrets
  • ·Format and validate JSON, YAML, TOML, XML, SQL
  • ·Compute HMAC and TOTP for API auth testing
  • ·Generate cryptographically strong passwords and UUIDs

Why Xonvert Dev

Compared with CyberChef, command-line tools, Xonvert's dev tools trade install, license, and account for a URL. Free, private, fast, and offline-capable once loaded. The depth a desktop tool offers, with none of the friction.

Frequently asked questions

Are the Xonvert Dev tools free?+
Yes — every tool is free. No signup, no credit card, no trial limits. Pro removes the small export watermark on free tools and lifts daily quotas on the heaviest operations.
Do my files leave my device?+
No. The Dev tools run entirely in your browser. Your files are processed locally and never reach our servers.
Do they work offline?+
Yes — once a tool page is loaded, the browser caches its code and the tool keeps working without internet.
Do they work on mobile?+
Yes. Every dev tool works in modern mobile browsers on Android and iOS without an app install.
Can I use these for commercial work?+
Yes, with no licensing fees. We don't claim rights to anything you produce.