What developer tools are available?

DevToolsHub includes JSON formatter, Base64 encoder/decoder, regex tester, JWT decoder, hash generator (MD5, SHA), CSV/JSON and YAML/JSON converters, PEM certificate decoder, URL encoder, UUID generator, Markdown preview, text diff, XML formatter, cron generator, password generator, QR code generator, and more.

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Free developer tools that just work

Q: Are DevToolsHub tools free?

Yes. All tools on DevToolsHub are free to use with no signup or account required.

Q: Is my data sent to your servers?

Most tools run entirely in your browser. Your JSON, text, certificates, and other inputs are not stored on our servers unless a tool explicitly uses an external API (for example, “What is my IP”).

Q: How do I share a result with a link?

Many tools offer a “Share URL” button that puts your input or options in the page URL as query parameters. Copy the link and open it later to restore the same state.

Format JSON, decode JWTs and certificates, compare text, generate hashes, and more—right in your browser.

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Explore the toolkit

Three categories—same as the header menu—so you can find what you need fast.

Format & convert

Structure, markup, and data conversion

JSON Formatter

Validate, prettify, minify, and view JSON in tree format.

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XML Formatter

Validate, prettify, and minify XML. Share via URL. No signup required.

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YAML / JSON

Convert YAML to JSON or JSON to YAML. Copy, download, share via URL.

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CSV / JSON

Convert CSV to JSON or JSON to CSV. Delimiters, headers, shareable URL, download.

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Markdown Preview

Live Markdown editor with rendered and HTML view. Copy HTML, share via URL. GFM supported.

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HTML Entities

Escape and unescape HTML entities; optional full numeric encoding. Shareable URLs.

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Text Diff

Compare two texts. Unified or side-by-side diff. Highlights and shareable URL.

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Lorem Ipsum

Paragraphs, words, sentences, or lists. Custom length, copy, download .txt, share URL.

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Encode & security

Encoding, tokens, keys, and certificates

Base64 Encode / Decode

Encode text or files to Base64, decode to text or download as file.

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URL Encode / Decode

Percent-encode text for URLs or decode URL-encoded strings. Shareable URL.

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Hash Generator

Generate MD5, SHA-1, and SHA-256 hashes from text. Copy or share via URL.

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JWT Decoder

Decode JWT header and payload to JSON. View exp, iat. Shareable URL.

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PEM / Certificate Decoder

Decode SSL and X.509 PEM certificates. Subject, issuer, validity, SAN, and more.

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Password Generator

Strong random passwords. Length 8–64, character sets, shareable URL.

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UUID Generator

Generate UUID v4 online. Copy one or many, share URL with count.

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Dev utilities

Patterns, time, network, and misc tools

Regex Tester

Live match highlighting, match list, and line-by-line test strings.

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Color Picker

Pick a color and convert between HEX, RGB, and HSL. Copy values or share via URL.

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Cron Generator

Build cron schedules with presets or custom syntax. Next run times and share via URL.

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QR Code Generator

Create QR codes from text or URLs. Size options, download PNG, share via URL.

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Unix Timestamp

Convert epoch time to date or date to timestamp. Seconds and milliseconds.

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User-Agent Parser

Parse your User-Agent to browser, OS, and device type. Share via URL.

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What is My IP

Check your public IPv4 address instantly. No signup. Copy or share this page.

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Frequently asked questions

Quick answers about pricing, privacy, and how to use the site.

Are DevToolsHub tools free?

Yes. Every tool is free with no signup or account. Use them as often as you like.

Is my data sent to your servers?

Most tools run in your browser only—your JSON, text, PEM certificates, and similar input stay on your device. Tools that need the network (for example checking your public IP) call external services only for that purpose.

How do I share a result with a link?

Many pages include a Share URL button. It copies a link with your input encoded in query parameters so you or teammates can reopen the same state later.

What tools can I use?

JSON formatter and validator, Base64 encode/decode, regex tester, JWT decoder, MD5/SHA hash generator, CSV↔JSON and YAML↔JSON converters, PEM and SSL certificate decoder, URL encoder, UUID generator, Markdown preview, text diff, color picker, cron builder, XML formatter, password and QR generators, and more—all listed below.