JSON Validator & Formatter

Validate JSON online with detailed error messages showing line and column numbers. Format and beautify JSON data instantly.

Validator Formatter Error Location

YAML Validator & Formatter

Validate YAML online with detailed error messages. Format YAML and convert to JSON instantly. Perfect for Kubernetes, Docker Compose, and CI/CD configs.

Validator Formatter YAML → JSON

TOML Validator & Formatter

Validate TOML online with detailed error messages. Format TOML and convert to JSON instantly. Perfect for Cargo.toml, pyproject.toml, and config files.

Validator Formatter TOML → JSON

Regex Tester & Debugger

Test regular expressions with real-time highlighting, pattern explanation, capture groups, and find-replace. Supports all JavaScript regex flags.

Real-time Highlighting Explainer

Cron Expression Generator

Parse, validate, and build cron job expressions visually. Translate cron expressions to plain English and see next scheduled run times.

Translator Builder Scheduler

Quartz Scheduler Cron

Parse, validate, and build Quartz Scheduler cron expressions (6-7 fields). Supports ?, L, W, # syntax. Compatible with Java Quartz and Spring Boot.

Translator Builder Quartz/Spring

Base64 Encoder & Decoder

Encode text to Base64 or decode Base64 to text instantly. Supports UTF-8 characters including emojis and special characters.

Encoder Decoder UTF-8

JWT Decoder & Inspector

Decode JWT tokens instantly. Inspect header, payload, and signature with color-coded visualization. Check expiration and view claims.

Decoder Expiration Claims

SSL/TLS Certificate Decoder

Decode X.509 PEM and DER certificates. View subject, issuer, validity, SANs, fingerprints, and full certificate chains.

X.509 Expiry Chain

Snowflake ID Decoder

Decode Discord, Twitter, and Instagram IDs to timestamps. Visualize the 64-bit structure and generate sample Snowflake IDs.

Discord Twitter Timestamp

CBOR Decoder

Decode RFC 8949 CBOR payloads to JSON in your browser. Paste hex or base64, or drop a .cbor file. Recognizes COSE, CWT, bignums, and tags.

RFC 8949 Hex / Base64 COSE / CWT

User Agent Parser

Parse HTTP User-Agent strings to identify browser, OS, device type, and bots. Single and bulk mode with CSV and JSON export.

Browser OS Bot

HAR File Viewer

Open Chrome, Firefox, Safari, or Edge HAR exports. Inspect requests, headers, cookies, bodies, and a per-request timing waterfall. Filter and redact secrets.

Waterfall Filters Redact

Curl Converter

Convert curl commands to Python, PHP, Go, Axios, Java, C#, or PowerShell. Handles JSON, forms, multipart, and auth. 100% client-side.

Python PHP Go

UUID Generator & Decoder

Generate UUID v4 (random) and UUID v7 (timestamp-based). Bulk generate, decode versions, extract timestamps, and validate format.

v4 Random v7 Timestamp Bulk

ULID Generator & Decoder

Generate ULIDs (sortable unique IDs). Decode timestamps, bulk generate, validate format, and compare ULID vs UUID.

Sortable Timestamp Bulk

Epoch Timestamp Converter

Convert Unix timestamps to human-readable dates and dates to Unix timestamps. Supports seconds, milliseconds, and multiple formats.

Date Timestamp Timezone

SLA Uptime Calculator

Calculate allowed downtime for any SLA percentage. Convert 99.9% uptime to actual downtime per day, month, and year. Understand the "nines" in practice.

Nines Downtime Reference

URL Encoder & Decoder

Encode text for URLs using percent encoding or decode URL-encoded strings back to readable text. Supports encodeURIComponent and encodeURI.

Encode Decode Percent

SQL Formatter & Beautifier

Format and beautify SQL queries with proper indentation, keyword capitalization, and syntax highlighting. Supports MySQL, PostgreSQL, SQL Server, and Oracle.

Formatter Minifier Highlighting

QR Code Generator

Create custom QR codes for URLs, text, email, phone numbers, WiFi networks, and more. Customize colors, size, and error correction. Download as PNG or SVG.

URL/Text/Email WiFi Customizable

Lorem Ipsum Generator

Generate Lorem Ipsum placeholder text instantly. Create paragraphs, sentences, or words of dummy text for web design, mockups, and development. One-click copy.

Paragraphs Sentences HTML Tags

Chmod Calculator

Calculate Linux/Unix file permissions in octal and symbolic notation. Interactive checkboxes, common presets, and chmod command generator.

Octal Symbolic Command

Subnet Calculator

Calculate IPv4 and IPv6 subnets from IP and CIDR. Network, broadcast, subnet mask, wildcard, host range, and VLSM split.

IPv4 IPv6 CIDR Chart

Text Diff Checker

Compare two blocks of text or code side by side with highlighted additions, deletions, and character-level changes. Inline and side-by-side views.

Additions Deletions Side-by-Side

LLM Token Counter

Count tokens for GPT-4o, GPT-4, GPT-3.5, Claude, Llama 3, Gemini, and Mistral. Exact tiktoken counts for OpenAI plus a live, color-coded token visualization.

tiktoken Visualizer Multi-model