231 tools · zero uploads · always free

Developer tools that never see your data.

231 formatters, decoders, converters and generators. Everything runs locally in your browser — private by architecture, not by promise.

⌕

231

free tools

0

server uploads

100%

client-side

£0

forever

🛡️

Why “privacy-first” matters here.

In November 2025, researchers found two popular formatter sites had leaked 5GB of pasted user data — API keys, tokens, configs — because those tools upload what you type. Blank2Done tools never make a network request with your input. Verify it yourself in DevTools. // your data stays in this tab

Most used

JSON & Data

JSON Formatter

Pretty-print & validate JSON

JSON Sorter

Sort object keys alphabetically

CSV ⇄ JSON

Bidirectional conversion

JSON Path Finder

Extract values by path

Security & Tokens

JWT Decoder

Inspect claims without uploading

Password Generator

Cryptographically secure

Diff Checker

Compare text line by line

UUID Generator

RFC 4122 v4 UUIDs

Text & Encoding

Base64 Encoder

Text ⇄ Base64, UTF-8 safe

URL Encoder

Percent-encode components

Text Diff

Line-by-line comparison

ROT13 Cipher

Classic text rotation

Media & Files

PDF to Image

Extract pages as PNG locally

PDF Utility

Merge & rotate PDFs locally

Media Compressor

Compress media files fast

QR Code Generator

Scannable QR codes offline

Browse all 231 tools →

🔒

Private by architecture

Competitors upload what you paste. Our tools make zero network requests with your input — open DevTools and verify.

⚡

Instant, offline-friendly

Static pages, client-side logic, no accounts. Paste-speed tools that work even on flaky Wi-Fi.

∞

Free, forever

231 tools, no paywalls, no “pro” tiers, no rate limits. Supported by unobtrusive ads — never by your data.

How it works

1

Open any tool

Browse 231 tools or search — no account, no sign-up.

2

Paste or drop

Paste text, drop files. Processing happens in this tab.

3

Copy & go

Results are instant. Zero server round-trips, zero residue.