Fast · Free · No login

Simple, fast online tools for developers.

Format JSON, encode Base64, generate UUIDs, parse JWTs, test regex, convert JSON and YAML, analyze HTTP headers, count words, and more.

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Popular tools

JSON Formatter → UUID v4 Generator → Timestamp Converter →

Developer tools catalog

Browse developer tools by category or search the full catalog.

Data & Format

Format, convert, validate, and inspect JSON, YAML, XML, SQL, and other structured data.

20 tools · View category

Format and minify JSON instantly.

JSON ↔ YAML Converter

Convert JSON to YAML and YAML to JSON instantly.

Format, minify, and normalize SQL queries instantly in your browser.

JSON ↔ CSV Converter

Convert JSON to CSV and CSV to JSON instantly in your browser.

Compare two JSON objects instantly in your browser.

XML Formatter / Validator

Format, minify, and validate XML instantly in your browser.

JSON Lines Viewer / NDJSON Viewer

View NDJSON as a table and convert it to a JSON array.

YAML Validator / YAML Formatter

Validate, format, and minify YAML instantly in your browser.

TOML Validator / Formatter

Validate TOML syntax, format TOML files, and convert TOML to JSON.

INI / ENV Parser

Parse INI and .env configuration files into structured JSON.

Properties / .properties Parser

Parse Java .properties files into structured JSON.

JSON Schema Validator / Generator

Generate JSON Schema from JSON and validate JSON against schema.

OpenAPI / Swagger Validator & Explorer

Validate OpenAPI YAML or JSON and explore endpoints, schemas, servers, security, and responses.

GraphQL Formatter / Validator

Format GraphQL queries, mutations, fragments, and schema SDL, validate syntax, and inspect document structure.

JSONPath Tester

Run JSONPath expressions against JSON and inspect matching values and paths.

JSON Escape / Unescape

Escape text for JSON strings and unescape JSON string sequences.

JSON to TypeScript Interface Generator

Generate TypeScript interfaces or type aliases from JSON examples.

MessagePack ↔ JSON Converter / Viewer

Convert JSON to MessagePack and decode MessagePack to JSON.

CBOR ↔ JSON Converter / Viewer

Convert JSON to CBOR and decode CBOR to JSON.

BSON ↔ JSON Converter / Viewer

Convert JSON to BSON and decode BSON to JSON.

Encoding & Security

Encode, decode, hash, sign, and inspect tokens, secrets, and encoded values.

16 tools · View category

Base64 Encoder / Decoder

Encode and decode Base64 online instantly. Free Base64 converter with no login.

Encode URL strings online

Generate MD5, SHA-1, or SHA-256 hashes online.

Decode JWT header and payload instantly in your browser.

JWT Encoder (HS256)

Generate signed JWT tokens using HS256 (HMAC SHA-256) directly in your browser.

Password Generator

Generate strong random passwords instantly in your browser.

HTML Entity Encoder / Decoder

Encode and decode HTML entities instantly in your browser.

Generate HMAC-SHA-256, SHA-1, and SHA-512 signatures instantly in your browser.

Analyze, validate, and edit JWT tokens online.

Webhook Signature Verifier

Verify webhook signatures using HMAC and compare provided vs computed signatures.

Bcrypt Hash Generator / Verifier

Generate bcrypt hashes and verify plaintext against a bcrypt hash.

ASN.1 / DER / PEM Decoder

Decode PEM, DER, certificates, CSRs, and keys into readable summaries.

X.509 Certificate Decoder

Decode X.509 certificates from PEM, Base64 DER, or hex DER. Inspect subject, issuer, SANs, validity, fingerprints, key usage, and certificate metadata.

Certificate Chain Validator

Validate certificate chains, detect missing intermediates, check expiry, and inspect issuer relationships.

Decode and inspect certificate signing requests online. View CSR subject, SAN, public key details, and DER/PEM formats.

Analyze Content Security Policy directives and find risky CSP settings.

Network & Web

Parse URLs, inspect HTTP data, and check domain or network-related information.

9 tools · View category

HTTP Headers Parser

Parse raw HTTP headers into JSON and readable key-value pairs.

HTTP Status Code Lookup

Look up HTTP response codes such as 404, 301, 302 and 500 instantly.

Parse URLs and query parameters into structured parts instantly.

Parse cURL commands into method, URL, headers, query parameters, and body instantly.

User-Agent Parser

Parse browser, OS, device, engine, and bot info from User-Agent strings.

DNS Lookup / IP & Domain Info

Check DNS records, reverse DNS, and IP/domain details instantly.

Check registrar, dates, nameservers, statuses, and raw WHOIS data.

SSL / TLS Certificate Checker

Check certificate validity, expiration, issuer, SANs, OCSP, and TLS details.

IP Subnet Calculator

Calculate IPv4 network, broadcast, subnet mask, wildcard mask, and host range from IP/CIDR.

Text & Content

Transform, compare, sort, count, and process text directly in the browser.

10 tools · View category

Convert text into a clean, URL-friendly slug.

Test regular expressions against text and see matches instantly.

Count words, characters, lines, paragraphs and reading time instantly.

Convert text to uppercase, lowercase, title case, camelCase, snake_case, or kebab-case.

Compare two texts line by line and highlight differences.

Lorem Ipsum Generator

Generate placeholder text for design, UI, and content layouts.

Duplicate Line Remover

Remove duplicate lines from text quickly and cleanly.

Sort lines of text quickly and cleanly.

Unique Line Counter / Duplicate Line Counter

Count unique and duplicate lines in text quickly.

Markdown Preview

Preview Markdown and copy rendered HTML instantly.

CSV & Data

View, filter, extract, and convert CSV and other table-like data.

5 tools · View category

CSV Viewer / CSV to Table

View CSV as a table and convert it to JSON.

SQL to CSV / Table Extractor

Extract rows from SQL INSERT statements and convert them to CSV.

CSV Column Extractor

Extract a single column from CSV by name or index.

Filter CSV rows by value, match type, and selected column.

CSV Deduplicator

Remove duplicate CSV rows by full row or selected column.

SEO & Webmaster

Helpful technical SEO and webmaster tools for metadata, robots.txt, and sitemaps.

9 tools · View category

Robots.txt Tester / Generator

Analyze and generate robots.txt rules online.

Meta Tags / Open Graph Preview

Preview Google and Open Graph snippets and generate meta tags.

Sitemap.xml Validator / Viewer

Validate and inspect sitemap.xml structure, URLs, and sitemap index files.

Keyword Density Checker

Analyze word frequency and phrase density in your text for better SEO optimization.

Schema.org (JSON-LD) Generator

Generate JSON-LD structured data for Articles, Products, FAQ, and more to improve search visibility.

Generate Google Analytics campaign URLs with UTM parameters.

Redirect Checker

Trace HTTP redirects, inspect 301/302 chains, and verify final destination URLs.

HTML Minifier / Beautifier

Compress and format HTML code instantly.

Security Headers Checker

Analyze HTTP security headers and get a security grade for your website.

Generators & Validators

Generate and validate UUIDs, timestamps, cron expressions, and similar values.

6 tools · View category

Timestamp Converter

Convert UNIX timestamp to ISO date and back.

UUID v4 Generator

Generate UUID v4 instantly in your browser. No data is sent to the server.

Cron Expression Parser

Convert cron expressions to human-readable schedules.

Generate UUID v4 values instantly in your browser.

QR Code Generator

Create QR codes from text or URLs and download them as SVG or PNG.

Validate UUID strings and detect version and variant.

Developer Misc

Useful extra tools for everyday development tasks.

27 tools · View category

Color Converter

Convert HEX, RGB, RGBA, and HSL colors instantly in your browser.

CSS Box Shadow Generator / Parser

Generate, parse, and preview CSS box-shadow values online. Adjust offset, blur, spread, color, and inset.

CSS Gradient Generator

Generate, parse, and preview CSS linear and radial gradients online. Free gradient generator for developers and designers.

CSS Clip-Path Generator

Generate and parse CSS clip-path values for polygon, circle, ellipse, and inset shapes.

CSS Border Radius Generator

Generate and parse CSS border-radius values with live preview.

CSS Transform Generator

Generate and parse CSS transform values like translate, scale, rotate, skew, and transform-origin.

CSS Animation Generator

Generate CSS animation shorthand, keyframes, and ready-to-use CSS with live preview.

CSS Filter Generator

Generate and parse CSS filter values with live preview for blur, brightness, contrast, grayscale, hue-rotate, invert, opacity, saturate, and sepia.

CSS Text Shadow Generator

Create, preview, parse, and copy CSS text-shadow values with multiple shadow layers.

CSS Backdrop Filter Generator

Create and preview CSS backdrop-filter values for glassmorphism, frosted panels, and blurred overlays.

CSS Outline Generator

Generate and preview CSS outline styles with width, style, color, and outline-offset.

CSS Border Generator

Create CSS border styles with width, style, color, and border radius.

CSS Background Pattern Generator

Create CSS background patterns with dots, grids, stripes, diagonal lines, and checkerboards.

CSS Glassmorphism Generator

Create frosted glass CSS cards with backdrop blur, transparent backgrounds, borders, radius, and shadows.

CSS Flexbox Generator

Create CSS flexbox layouts with live preview, alignment controls, wrapping, direction, gap, and ready-to-copy CSS.

CSS Grid Generator

Build CSS Grid layouts with columns, rows, gaps, alignment, live preview, and copy-ready CSS.

CSS Media Query Generator

Build responsive CSS media queries for width breakpoints, orientation, dark mode, reduced motion, and hover support.

CSS Container Query Generator

Generate CSS container queries with container type, container name, breakpoint rules, and responsive declarations.

CSS Unit Converter

Convert CSS units such as px, rem, em, %, vw, and vh with base font size, parent size, and viewport settings.

CSS Clamp Generator

Generate responsive CSS clamp() values for fluid typography, spacing, gaps, and layout sizing.

CSS Minifier / Beautifier

Minify CSS to reduce file size or beautify compressed CSS for easier reading.

CSS Specificity Calculator

Calculate and compare CSS selector specificity scores.

CSS Selector Tester

Test CSS selectors against HTML and inspect matched elements.

JavaScript Minifier / Beautifier

Compress and format JavaScript code instantly.

HTML Attribute Sorter / Cleaner

Sort, normalize, and clean attributes in HTML snippets.

HTML Table Generator

Create semantic, responsive HTML tables with live preview.

HTML Form Generator

Build semantic HTML forms with labels, validation attributes, fieldsets, live preview, and copy-ready markup.

Practical developer guides

Short, focused guides that explain common debugging workflows behind the tools: redirects, DNS records, UTM links, HTTP responses, and more.

View all guides

How to debug redirects and HTTP status codes

A practical workflow for checking redirect chains, understanding 301 vs 302, diagnosing 404 and 500 responses, and confirming the final URL.

DNS and domains

How to troubleshoot DNS records for a domain

A practical DNS checklist for website hosting, email records, domain verification, nameserver changes, SSL certificates, and reverse DNS.

How to build clean UTM campaign URLs

A simple naming workflow for utm_source, utm_medium, utm_campaign, utm_content, and utm_term that keeps analytics reports readable.

Common developer workflows

Use Toolinix as a small workflow hub, not only as separate utilities. These paths connect related tools for common debugging and publishing tasks.

API debugging

Format payloads, parse copied cURL commands, and check HTTP responses before changing application code.

JSON Formatter cURL Parser HTTP Status Code Lookup

Technical SEO checks

Validate sitemap and robots.txt signals, then confirm redirects and final indexable URLs.

Sitemap.xml Validator / Viewer Robots.txt Tester / Generator Redirect Checker

Domain and security review

Inspect DNS records, SSL certificates, and security headers before deploying or changing infrastructure.

DNS Lookup / IP & Domain Info SSL / TLS Certificate Checker Security Headers Checker

Built for quick work, with clear data handling

Toolinix is designed for practical developer tasks without accounts or unnecessary friction. Some tools run entirely in your browser, while network lookup tools need server-side requests to inspect public records.

Read privacy details

No account required

Use tools immediately without creating a profile, dashboard, or login.

Browser-first tools

Many formatters, encoders, generators, and text tools process input locally in your browser.

Transparent lookups

DNS, WHOIS, SSL, redirect, and similar diagnostic tools may contact external services or public endpoints to return useful results.

About Toolinix

Toolinix is a collection of fast, free online developer tools that run directly in your browser.

Format JSON, encode or decode Base64, generate UUID v4 values, convert UNIX timestamps, work with JWT, regex, HTTP headers, status codes, text statistics, and other useful developer tools — all without login or tracking.

JSON Formatter JWT Decoder Regex Tester JSON ↔ YAML Converter HTTP Headers Parser Word Counter

Frequently Asked Questions

Is Toolinix free to use?

Yes. All tools are free to use and require no account.

Do you store my data?

We do not aim to store your input. Many tools run directly in your browser, while some may use server-side processing to generate results. We do not use your data for accounts, resale, or unnecessary tracking.

Which tools are available?

Toolinix offers a wide range of developer tools including formatters, generators, converters, parsers, and diagnostic utilities. These include JSON Formatter, SQL Formatter, XML Formatter, cURL Parser, UUID Generator, HMAC Generator, DNS Lookup, User-Agent Parser, and many more.

Does Toolinix work on mobile?

Yes. Toolinix is fully responsive and works well on modern mobile browsers.