All-in-one Toolbox

Free Online Tools for Developers & Everyday Tasks

OneToolBox is a free online tools hub for developers and everyday tasks, built for speed and privacy. Use it to expand URLs, check meta tags, generate secure passwords, convert timestamps, clean text, and more. Every tool runs in your browser, so you get quick results without creating an account or sending sensitive data to a server.

Featured tools

Start with the most-used utilities and get clear results in seconds.

Fingerprint Checker

Audit browser signals and understand how unique your setup is.

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URL Expander

Reveal the full redirect chain behind shortened links.

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Meta Analyzer

Check titles, descriptions, and social tags in one report.

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Meta Tag Preview

Preview Google snippets and Open Graph cards.

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Hash Compare

Compare two hashes and verify if they match.

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Password Strength

Entropy score and brute-force estimate.

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Hash Generator

Create SHA-256/SHA-512 hashes for text or files.

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JWT Decoder

Decode token headers and payloads with expiry status.

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Git Ignore Generator

Generate .gitignore for popular stacks.

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Env File Linter

Find duplicates and unsafe names in .env files.

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Human Readable Config

Turn JSON or YAML into a plain-English summary.

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Regex Tester

Test patterns against logs with highlights.

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SSL Certificate Viewer

Check expiry, issuer, and SANs for any domain.

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Base64 Image Viewer

Preview Base64 images and confirm size plus dimensions.

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Password Generator

Create strong passwords with custom length and symbols.

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Timestamp Converter

Convert Unix timestamps to human dates and back.

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Season Countdown

See how many days are left until the next season.

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Cron Expression Translator

Turn cron syntax into a readable schedule.

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Text Case Converter

Switch between uppercase, lowercase, snake_case, and kebab-case.

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Text Diff

Highlight differences between two text blocks.

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Whitespace Cleaner

Remove invisible characters and extra spaces.

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Random Number / Dice

Generate numbers or roll dice with an animated UI.

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Distance Calculator

Measure distance between two coordinates using Haversine.

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Color Palette Generator

Build harmonious palettes for brands and UI.

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Image Palette Extractor

Extract dominant colors from any image.

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Contrast Checker

Verify WCAG contrast ratios fast.

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Gradient Generator

Create linear or radial CSS gradients.

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Color Converter

Switch between HEX, RGB, and HSL.

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Why OneToolBox exists

OneToolBox is built for developers, marketers, and teams who need fast answers without tab hopping or bulky desktop apps. Every tool is optimized for speed, privacy, and clarity, so you can get reliable outputs without handing over sensitive data.

We focus on client-side utilities that run in your browser, with no accounts, no tracking-heavy flows, and no intrusive popups. That keeps load times fast, reduces friction, and keeps the tools predictable.

What you can do here

From SEO audits to developer utilities, OneToolBox offers a growing set of tools for daily work. Expand shortened URLs, analyze metadata, generate secure passwords, and convert timestamps without leaving the page.

How to get started

  • Pick a tool from the sidebar.
  • Follow the on-page instructions.
  • Copy results instantly for reports or workflows.
  • Bookmark your favorites for quick access.

Why these tools are useful

You save time by working in a single, consistent toolbox while keeping data local to your browser. The output is designed to be copy-ready so you can move from check to action quickly.

FAQ

Do I need to create an account?

No. OneToolBox tools are available without login or signup.

Is my data safe?

Tools run locally in your browser whenever possible, and we keep interactions lightweight.

Read the practical guide

If you want a quick map of common workflows and best practices, read Productivity Utility Tools - Practical Use Cases and Best Practices. It shows how to chain tools together for SEO checks, security hygiene, data cleanup, and design handoff.

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