Developer Tools

A Tool For

The toolbox that lives in your tab

Twenty-eight browser utilities for data, auth, images, design, and web3. Private by default — no uploads for core work, no accounts, always free.

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Problem

Most online utility tools either leak privacy or add friction.

Developers and designers bounce between scattered sites that upload sensitive data, demand sign-ups, or feel bloated. A Tool For keeps those daily jobs in one fast, local-first tab.

Audience

Built for people doing real work

  • Frontend and backend developers
  • Web3 and Solidity builders
  • Designers working with color, type, and media
  • Anyone who wants image and text tools without uploads

How it works

From input to insight

  1. 01

    Pick a tool

    Jump in from a searchable sidebar — JSON, JWT, colors, Magic Eraser, and more.

  2. 02

    Run locally

    Formatting, conversion, hashing, and image work happen in your browser.

  3. 03

    Copy and continue

    Export or copy the output and keep working — no signup wall in the way.

Core features

What the product delivers

28 everyday utilities

Data & text, auth & crypto, images, design, web3, and developer helpers in one place.

Stays on your device

Core tools run client-side so sensitive JSON, tokens, and images are not uploaded to finish the job.

Magic Eraser

Brush away unwanted parts of an image with a local AI model — source files stay in the browser.

JSON, JWT, and web3 helpers

Format payloads, inspect tokens, encode ABIs, and convert ETH units without hopping sites.

Design utilities

Color palettes with contrast checks, font pairing, QR codes, and favicon generation.

Fast navigation

Searchable sidebar and local drafts so you can switch tools and pick up where you left off.

Privacy

Your data stays with you

Built so everyday tool work never needs a server round-trip for your content.

  • Formatting, hashing, JWT, regex, and most conversions run entirely in the browser.
  • Magic Eraser uses a local ONNX model — images are not sent to a processing API.
  • Drafts and theme preferences stay in local storage on your device.
  • No account wall; the only optional server write is a suggest-a-tool form.

Outcomes

What stands out

28

Tools

Your browser

Runs in

None

Account required

$0

Price

Featured tools

Utility depth where it matters most

Magic Eraser

Local inpaint with brush controls and before/after review while keeping source images on-device.

JSON Formatter

Dual-pane editing and a collapsible tree for fast debugging and payload cleanup.

Color Palette

Harmony generation, WCAG checks, and CSS/Tailwind exports for design handoff.

JWT + ABI tools

Token inspection and web3 encode/decode workflows without leaving the toolbox.

Tech stack

Built with modern, production-grade tools

Next.jsReactONNXClient-sideWeb3Privacy-first

Built by Sayonik

A Tool For proves utility products can be fast and private.

If you want a similar product-grade tool experience for your audience, we can design and build it end-to-end.

Open A Tool ForStart a project