Every simple tool,
one box.
A curated set of fast, privacy-first web utilities. Resize an image, generate a QR code, format JSON, pick a colour — every tool runs in your browser. No uploads, no accounts, no watermarks.
Private by default
Everything runs in your browser.
Instant results
Statically generated — no spinners.
Free forever
No premium tier, no watermarks.
Seven categories, 76 tools and counting.
Each tool is its own page, optimised for speed and built around a single job.
Text Tools
Transform, count, and clean up text in seconds.
Image Tools
Resize, convert, and transform images without uploads.
CSS Tools
Visual generators for modern CSS effects.
Coding Tools
Encoders, decoders, formatters, and hashing utilities.
Color Tools
Convert, mix, and generate palettes in any format.
Social Media Tools
Generate mock posts, grab thumbnails, build OG tags.
Miscellaneous Tools
QR codes, passwords, randomisers, and PDF utilities.
Start with the essentials.
The tools people reach for every week. Every one of them gets a dedicated, deeply-detailed page — these are launching first.
QR Code Generator
Generate custom QR codes for URLs, WiFi, contacts, and more.
Strong Random Password Generator
Create cryptographically strong passwords with a strength meter.
Lorem Ipsum Generator
Generate Lorem Ipsum placeholder text by paragraph, sentence, or word count.
Image Resizer
Resize images in your browser. Batch-friendly, privacy-preserving.
CSS Gradient Generator
Design linear, radial, and conic gradients with a visual editor.
JSON Tree Viewer
Validate, format, and interactively explore any JSON document.
HEX to RGBA Converter
Translate HEX to RGBA, HSL, HSV, CMYK, and OKLCH.
PDF Merger
Merge multiple PDFs in your browser with drag-and-drop order.
One box of tools. Built for speed, privacy, and zero BS.
simpletool.io is a free collection of single-purpose online utilities — the kind you search for once a week and always struggle to find a clean version of. We built it because the existing tool sites are overloaded with pop-ups, forced signups, and watermarks on outputs. Every tool here is free, requires no account, and ships ad-supported with a conservative layout. We aim to be the most honest free tools site on the internet.
Everything runs in your browser. When you resize an image, the pixels never leave your device. When you decode a JWT, the token is processed locally. When you generate a password, we use the browser's cryptographic random number generator — not a weak JavaScript pseudo-random function, and never a server. This privacy model is practical, not paranoid: fewer moving parts means faster results and nothing to breach.
Performance matters because tool users have low patience. Each page is statically generated at build time, ships a small HTML document, and defers every non-essential script until after first paint. Core Web Vitals stay green on mobile, and tools become interactive within a second on a mid-range phone. If you see a slower experience, we consider it a bug worth fixing before we add more features.
Every tool on simpletool.io is its own deeply-researched page. We write real explanations of what each tool does, how to use it, and the small details (character limits, colour spaces, hash algorithms) that usually require a separate search. If a tool is useful, its page should be useful too.
The full catalogue of 76 tools covers seven categories: text, image, CSS, coding, colour, social media, and miscellaneous. Tools launch on a rolling basis and are ordered by the search demand for what they do, so the most commonly-needed utilities arrive first. Every slug is present in the sitemap from day one so search engines can index the site as a whole while individual tools ship.