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.

15 tools

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.

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.

15 tools

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.

Network & Web

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

9 tools

HTTP Headers Parser

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

HTTP Status Code Lookup

Look up HTTP response codes and their meaning 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

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

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.

3 tools

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.

Generators & Validators

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

5 tools

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.

Validate UUID strings and detect version and variant.

Developer Misc

Useful extra tools for everyday development tasks.

1 tool

Color Converter

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

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.