24 tools in this category

JSON Formatter & Validator

Beautify, validate, and format JSON code

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Base64 Encoder / Decoder

Encode text to Base64 or decode Base64 strings

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Strong Password Generator

Generate random strong passwords with symbols

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SHA-256 Hash Generator

Generate SHA-256 cryptographic hashes

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Regex Pattern Tester

Test regular expressions against target strings

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JWT Token Decoder

Decode JWT tokens to view header and payload claims

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HTML Code Minifier

Minify HTML markup to optimize payload size

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UUID / GUID Generator

Generate RFC4122 v4 UUID unique identifiers

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CSS Minifier Tool

Minify CSS stylesheets to remove whitespace

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JavaScript Minifier

Minify JS source code scripts

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SQL Query Formatter

Format and indent SQL queries cleanly

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XML Code Formatter

Format and indent XML document structures

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URL Query Parameter Parser

Extract and inspect URL query parameters and protocol

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User-Agent Inspector

Inspect browser User-Agent strings and platform info

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htpasswd Password Generator

Generate Apache .htpasswd authentication credentials

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Cron Expression Builder

Build and read five-field cron schedules, with the next run times shown.

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CSV to JSON Converter

Parse CSV or TSV into JSON, with quoted fields and embedded newlines handled.

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JSON Diff

Compare two JSON documents structurally and list every added, removed or changed value.

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JSON to CSV Converter

Turn JSON records into a spreadsheet-ready CSV, flattening nested keys.

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JSON Schema Validator

Check JSON data against a JSON Schema and see exactly which rule failed.

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Lorem Ipsum Generator

Generate placeholder paragraphs, sentences, words or list items.

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Multi Hash Generator

Hash text or a file with MD5, SHA-1, SHA-256, SHA-384 and SHA-512 at once.

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Slug Generator

Turn titles into clean URL slugs, one at a time or in bulk.

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YAML to JSON Converter

Convert YAML to JSON and back, with multi-document support.

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About Developer Tools

Format, decode, hash and inspect the data formats you work with daily.

Frequently Asked Questions

What to expect from the Developer Tools on this page.

No. Formatting, minifying, encoding, hashing and parsing all happen in your browser. Nothing is logged, stored or transmitted, which is why these tools are safe for proprietary code and secrets.
They handle the overwhelming majority of real-world input correctly. They are not full language compilers, so pathological edge cases can produce imperfect output β€” always check the result before deploying it.
Hashing uses the browser's native SubtleCrypto implementation, which is the same primitive your operating system provides. Decoders such as the JWT tool only decode; they do not verify signatures.
Once a tool page has loaded, it keeps working without a connection, because all the logic is already in your browser.

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