Tools Nimbus / 027 instruments / browser-only

Small tools. Sharp output. Nothing uploaded.

Paste JSON, get it pretty. Decode the token, hash the string, test the regex. Every tool runs locally in your browser — free, no signup, and your data never leaves your device.

No signupNo uploadRuns locally

01 / Developer

Tool 001 / dev

QR Code Generator

Turn any text or URL into a scannable QR code. Download as PNG.

Tool 002 / dev

JSON Formatter

Pretty-print and validate JSON. Spot errors instantly.

Tool 003 / dev

Password Generator

Generate strong passwords with custom length and character sets.

Tool 004 / dev

Base64 Encoder & Decoder

Encode text to Base64 or decode Base64 back to text. UTF-8 safe.

Tool 005 / dev

URL Encoder & Decoder

Percent-encode or decode URLs and query string values instantly.

Tool 006 / dev

Hash Generator

Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes from any text.

Tool 007 / dev

UUID Generator

Generate random version 4 UUIDs in bulk. Copy with one click.

Tool 008 / dev

Unix Timestamp Converter

Convert Unix epoch seconds or milliseconds to dates, and back.

Tool 009 / dev

JWT Decoder

Decode a JWT header and payload in your browser. No signature check.

Tool 010 / dev

Regex Tester

Test a JavaScript regex against text with live matches and groups.

Tool 011 / dev

Number Base Converter

Convert numbers between binary, octal, decimal, and hexadecimal.

Tool 012 / dev

HTML Entity Encoder & Decoder

Escape text to HTML entities or decode entities back to plain text.

Tool 020 / dev

CSV to JSON Converter

Convert CSV to a JSON array of objects, or JSON back to CSV.

Tool 021 / dev

Open Graph & Meta Tag Generator

Generate Open Graph, Twitter Card, and meta tags with a live preview.

Tool 022 / dev

Cron Expression Explainer

Turn a cron expression into plain English and see its next run times.

Tool 023 / dev

Barcode Generator

Turn text or a product code into a scannable Code 39 barcode PNG.

02 / Text

Tool 015 / text

Word Counter

Count words, characters, sentences, and paragraphs as you type.

Tool 016 / text

Case Converter

Convert text to UPPERCASE, lowercase, Title Case, camelCase, and more.

Tool 017 / text

Lorem Ipsum Generator

Generate paragraphs, sentences, or words of placeholder text.

Tool 018 / text

Slug Generator

Turn any title into a clean, lowercase, hyphenated URL slug.

Tool 019 / text

Diff Checker

Compare two texts line by line with additions and removals highlighted.

Tool 024 / text

Markdown Previewer

Write Markdown and see the rendered HTML update live, side by side.

03 / Design

Tool 013 / design

Color Palette Generator

Pick a base color and get complementary, triadic, and analogous palettes.

Tool 025 / design

CSS Gradient Generator

Build a linear or radial CSS gradient and copy the exact background CSS.

04 / Files & Media

Tool 014 / files

Image Compressor

Compress JPG and PNG images in your browser. No uploads, ever.

Tool 026 / files

Image Format Converter

Convert an image between PNG, JPG, and WebP in your browser.

Tool 027 / files

Favicon Generator

Turn an image into a multi-size favicon.ico plus an Apple touch icon.