Section 04 / 10
DEV · 18 tools · free · runs in your browser

Developer Tools

Format JSON, minify code, encode Base64, hash text, make and read QR codes and barcodes, look up DNS, test your connection and handle PGP keys.

T-11DEV

JSON Formatter

Pretty-print, minify, diff two JSON blobs side-by-side.

LOCAL · FREELAUNCH →
T-12DEV

Code Minifier

Minify JS / CSS / HTML. Copy-ready, no dependencies.

LOCAL · FREELAUNCH →
T-13DEV

Base64 Encoder

Encode or decode text and files with one click.

LOCAL · FREELAUNCH →
T-14DEV

QR Generator

Generate crisp SVG/PNG QR codes. Wi-Fi & vCard presets.

LOCAL · FREELAUNCH →
T-15COLOR

Color Picker

Drop an image, steal its palette. HEX · OKLCH · RGB.

LOCAL · FREELAUNCH →
T-49DEV

QR Reader

Decode QR codes from an image, pasted screenshot, or live camera — free, no upload.

LOCAL · FREELAUNCH →
T-62DEV

HTML Preview

Live sandboxed HTML editor + preview with device widths — code never leaves your browser.

LOCAL · FREELAUNCH →
T-66SEC

PGP Tool

Generate keys, encrypt, decrypt, sign & verify with OpenPGP.js — keys never leave your device.

LOCAL · FREELAUNCH →
T-67NET

DNS Lookup

Query A, MX, TXT, NS + more via Cloudflare or Google DoH — with TTLs, from your browser.

LOCAL · FREELAUNCH →
T-77NET

Speed Test

Download, upload, latency & jitter in ~20s — measured against Cloudflare, no sign-up.

LOCAL · FREELAUNCH →
T-94DEV

Barcode Generator

EAN-13, UPC-A, EAN-8, Code 128, Code 39 & ITF-14 with automatic check digits — SVG + PNG.

LOCAL · FREELAUNCH →
T-105DEV

MD5 Hash

Hash any text in the tab. The invert side only brute-forces short strings — MD5 cannot be decrypted.

LOCAL · FREELAUNCH →
T-106DEV

SHA-1 Hash

SHA-1 hex via Web Crypto, plus an honest short brute-force — not a decoder.

LOCAL · FREELAUNCH →
T-107DEV

SHA-256 Hash

SHA-256 online: hash, compare, or try a tiny local search. One-way, no upload.

LOCAL · FREELAUNCH →
T-108DEV

SHA-512 Hash

512-bit digest in the browser. No decrypt, no rainbow table, no upload.

LOCAL · FREELAUNCH →
T-109DEV

Box Shadow Generator

Offset, blur, spread, inset — live preview and one copy-ready CSS line.

LOCAL · FREELAUNCH →
T-110COLOR

RGBA to HEX

rgba() ↔ 6- and 8-digit hex, alpha included. Live swatch, copy any format.

LOCAL · FREELAUNCH →
T-111DEV

Code to Image

Turn a snippet into a themed PNG — filename chrome, line numbers, local only.

LOCAL · FREELAUNCH →
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