Tools

Encoding

Base64 Text Encode and decode UTF-8 text to and from Base64, URL-safe optional. Base64 File Turn any file into a Base64 data string, or decode one back to a file. URL Encoder Percent-encode and decode URL components. HTML Entities Escape and unescape HTML special characters. Text to Binary Convert text to its binary representation and back. Text to Unicode Show the Unicode code points of a string, and rebuild a string from them. NATO Alphabet Spell out text using the NATO phonetic alphabet. String Obfuscator Obfuscate part of a string while keeping it readable. SafeLink Decoder Extract the real destination behind an Outlook SafeLink. Basic Auth Header Build an HTTP Basic Authorization header from a user and password.

Formats

JSON Formatter Validate, pretty-print and minify JSON, with optional key sorting. JSON Viewer Explore a JSON document as a collapsible tree or as a table of records, with a live count of nested values. JSON Minifier Strip all whitespace from JSON to shrink it. JSON to YAML Convert JSON documents to YAML. YAML to JSON Convert YAML documents to JSON. YAML to TOML Convert YAML documents to TOML. TOML to YAML Convert TOML documents to YAML. JSON to TOML Convert JSON documents to TOML. TOML to JSON Convert TOML documents to JSON. XML Formatter Pretty-print and minify XML. XML to JSON Convert XML documents to JSON. JSON to XML Convert JSON documents to XML. JSON to CSV Flatten a JSON array of objects into CSV. SQL Prettify Reformat SQL queries so they are readable. Markdown to HTML Render Markdown to HTML in the browser. YAML Viewer Validate and explore a YAML document. List Converter Convert between line lists, CSV, JSON arrays and other list formats.

Crypto

Hash Text Compute MD5, SHA-1, SHA-256 and SHA-512 digests of text. File Hash Checker Hash a file with MD5, SHA-1, SHA-256 and SHA-512, and check it against a published digest. SSH Key Generator Generate an Ed25519, ECDSA or RSA key pair, with the OpenSSH public key and fingerprints. HMAC Generator Compute keyed HMAC signatures with a choice of digest. UUID Generator Generate v4 UUIDs, single or in bulk. ULID Generator Generate sortable ULIDs, single or in bulk. Token Generator Generate random tokens and passwords of a chosen length and charset. bcrypt Hash a password with bcrypt, or verify one against a hash. AES Encryption Encrypt and decrypt text with AES. TLS Certificate Decoder Decode X.509 PEM certificates to inspect subject, issuer, SANs, validity dates, public key details, and SHA-256 fingerprints locally. RSA Key Pair Generate an RSA public and private key pair, and check whether two keys match. BIP39 Mnemonic Generate a BIP39 mnemonic phrase and derive its seed. Password Strength Estimate how long a password would take to crack. PDF Signature Checker Inspect the digital signatures embedded in a PDF.

Network

IP & Geolocation Lookup Show your public IP (or any address) with its country, city, coordinates and ISP. HTTP Request Tester Send an HTTP request from the browser and inspect responses. CORS Checker Check whether a URL can be read from this browser origin and inspect visible CORS headers. curl Tester Parse, explain and rebuild curl commands locally. curl Converter Convert curl commands into JavaScript fetch, Axios or Python requests code. gRPC Tester Build grpcurl commands and test gRPC-Web endpoints from the browser. DNS Lookup Resolve A, AAAA, MX, TXT, NS, SOA, CAA and SRV records over DNS-over-HTTPS. WHOIS Lookup Show registrar, registration and expiry dates, status and nameservers for a domain. IPv4 Subnet Calculator Work out the network, broadcast, mask and host range for a CIDR block. IPv4 Address Converter Convert between dotted, decimal, hex and binary IPv4 forms. IPv4 Range Expander Expand an IP range into the CIDR blocks that cover it. IPv6 ULA Generator Generate a random IPv6 unique local address prefix. MAC Address Lookup Look up the vendor behind a MAC address OUI. MAC Address Generator Generate random MAC addresses, with optional prefix. Random Port Generator Pick one or more unused-looking port numbers. WebSocket Tester Open a WebSocket from the page, send frames and watch what the server sends back. IPv6 Expander Expand, compress and classify an IPv6 address, with prefix and embedded IPv4 support. HTTP Header Parser Turn a pasted header block into a clean table, including cookies and repeated fields. HTTP Header Builder Build a tidy header block from key/value lines, with common security headers ready to add. WebSocket Frame Parser Decode a raw WebSocket frame from hex and explain its opcode, length and payload. Port Reference Search the common TCP and UDP ports with their service names and a short description. SSH Tunnel Builder Assemble an ssh -L, -R or -D tunnel with the right ports, identity file and keepalive options, then copy the command. Email Header Analyzer Parse raw email headers, list the delivery hops and show where the time went. Open Graph Debugger Extract Open Graph and Twitter Card tags from pasted HTML and preview the shared card. Network Info Show what this browser exposes about its connection, device, screen and locale. API Mock Response Builder Describe fields once and generate realistic mock JSON for an API response. Webhook Tester Sign, verify and send a test webhook in the Stripe, GitHub or Shopify format. SNAP BI Asymmetric Signature Build, sign and verify the SHA256withRSA signature used by Bank Indonesia's SNAP BI standard.

DevOps

Dev Ops Describe a Linux problem and get safe commands, flag explanations, a risk level and the next troubleshooting steps. systemd Service Builder Generate a foreground application service with a non-root user, restart policy, environment file, and installation commands. tar Command Builder Build GNU tar create, list, and extract commands with compression, excludes, path stripping, and overwrite warnings. rsync Command Builder Build local or SSH directory transfers with dry-run, trailing-slash explanations, excludes, bandwidth limits, and guarded deletion. find Command Builder Assemble a find command with name, type, size, age and depth tests, then choose to print, delete or exec on each match. xargs Builder Build and explain an xargs command — null input, batch size, parallelism and a replace string, with a note on each flag.

Web

JWT Parser Decode, live-edit and verify JSON Web Tokens. JWT Encode Create, edit and sign JSON Web Tokens from header and payload JSON. JWT Expiry Editor Edit iat, nbf and exp claims on a JWT and re-sign it without touching JSON by hand. UTM Builder Build and parse UTM campaign URLs with source, medium, campaign, term, content and id. URL Parser Break a URL into its parts and query parameters. User Agent Parser Read the browser, engine, OS and device from a user-agent string. Microphone Recorder Check a microphone, watch its level and peak, and record a clip to play back or download. OpenAPI Viewer Read an OpenAPI or Swagger document and list its operations, parameters and responses. MIME Types Look up the MIME type for a file extension. HTTP Status Codes Reference list of HTTP response status codes and their meaning. Meta Tag Generator Generate HTML meta tags for a page. Keycode Info Press a key to see its code, key and modifier state. Slugify Turn any text into a clean URL slug. OTP Generator Generate and verify time-based one-time passwords. Device Information Show what the browser reports about the current device. QR Code Generator Generate a QR code from text or a URL. Wi-Fi QR Code Build a QR code that joins a Wi-Fi network. QR Code Editor Restyle a QR code — module shapes, gradient colours, logo, transparent background. Sticker Maker Create PNG stickers with shapes, text decoration, outlines and simple background removal. SVG Placeholder Create a placeholder image as an SVG. Camera Recorder Record a short video from the webcam in the browser. Image Metadata Viewer Read the EXIF, GPS, comments and colour data hidden inside a photo, without uploading it. Image Compressor Resize and re-encode an image in the browser — cap its dimensions, pick a format and quality, then download the smaller file. EXIF Remover Strip EXIF, GPS and other hidden metadata from a photo by re-encoding it in the browser. Image Format Converter Convert a picture between JPEG, PNG, WebP and AVIF, with a quality slider and a before-and-after size. Watermark Tool Draw a text watermark onto a picture, choosing the corner, size, colour and opacity. Photo Resizer by Target Size Shrink a photo until it fits a size in kilobytes, keeping the highest quality that still fits. Screenshot Privacy Cleaner Pixelate or black out parts of a screenshot before sharing it. Background Remover Clear a plain background from an image by flooding in from the edges. Zip Builder Bundle several files into a zip archive in the browser, with a choice of compression level. PDF Page Counter and Info Read a PDF to see its page count, page sizes, version and document information. PDF Page Extractor Keep only the pages you choose from a PDF and download the rest as a new file. PDF Merger Join several PDFs into one document, in the order you set. Text to PDF Write plain text out as a PDF, with wrapping, page size, margins and page numbers. HTML Editor A small rich-text editor that exports clean HTML. JavaScript Playground Run JavaScript in your browser with live console output, interactive input, optional auto-run and a stoppable Web Worker. TypeScript Playground Transpile TypeScript and run it in your browser with live console output, interactive input and coding examples. Python Playground Run Python in your browser with Pyodide, interactive or prepared input, console output and coding examples. Ruby Playground Run Ruby in your browser with a WASI runtime, interactive or prepared input, console output and coding examples. C Playground Compile and run C in your browser with a WASI Clang toolchain, interactive or prepared input, console output and coding examples. C++ Playground Compile and run C++ in your browser with a WASI Clang toolchain, interactive or prepared input, console output and coding examples. WhatsApp Link Generator Turn a phone number and a message into a wa.me click-to-chat link.

Workflow

nginx Config Generator Build an nginx server block for a static site, a single-page app, PHP or a reverse proxy. nginx Reverse Proxy Wizard Step through domain, upstream, TLS and extras to get a reverse proxy server block. Crontab Generator Build a cron expression and read it back in plain language. chmod Calculator Convert between octal and symbolic Unix file permissions. Docker Run to Compose Turn a docker run command into a docker-compose service. Docker Logs Grep Filter docker compose logs with grep-style context, invert and dedupe modes. Log Redactor Redact common sensitive fields, private-key blocks, URL credentials, JWT-like tokens, emails, and IPs before manually reviewing logs for sharing. Log Parser Parse JSON Lines, Apache/Nginx access logs, syslog, logfmt and plain logs into a searchable table. Dockerfile Builder Build a Dockerfile from a form, with multi-stage presets for Node, Python, Go, Nginx and more. Git Cheatsheet A quick reference of the Git commands I keep forgetting. Regex Tester Test a regular expression against sample text with live matches. Regex Replace Tester Preview regex find-and-replace results with capture group references and live highlighting. Cron Next Runs Preview the next scheduled runs of a cron expression in local time or UTC. Regex Cheatsheet A quick reference of regular-expression syntax. JSON Diff Compare two JSON documents and highlight the differences. Text Diff Compare two blocks of text line by line. Timestamp Converter Convert between Unix timestamps, ISO strings and local time. Time Zone Converter Read a log timestamp in one zone and see the same moment in UTC, Jakarta and others.

Text

Lorem Ipsum Generate placeholder paragraphs, sentences or words. Text Statistics Count characters, words, sentences, lines and reading time. Emoji Picker Search emoji by name and copy them. Numeronym Turn long words into numeronyms like i18n. ASCII Text Render text as large ASCII-art banners. Case Converter Switch text between camelCase, snake_case, kebab-case and more. Line Comma Formatter Add commas, quotes, arrays or SQL IN formatting to one-item-per-line lists. .env Diff Checker Compare two .env configurations for missing keys, changed values, and empty values, with result values hidden by default. .env Key Sorter Sort the keys in a .env file alphabetically, keeping each comment with its key and optionally dropping duplicates or aligning values. sed Simulator Simulate substitutions, line deletion, and selected-line printing on pasted ASCII text with a bounded browser-side regex subset. grep Simulator Simulate line filtering, context, counts, word matching, and matching-text output on pasted ASCII text without searching files. sed Replacement Builder Build a sed command to replace text, delete matching lines or print only matches, with in-place editing and backups. grep Pattern Builder Build a grep command with the right regex style, recursion, includes and context lines, then copy it. Currency Formatter Format a number as a currency amount with thousand separators and a symbol, in Indonesian or English style. Number to Words Spell an Indonesian number out in words, for invoices and receipts. Typo Spotter Flag double spaces, stray spaces around punctuation, repeated words and informal Indonesian short forms. WhatsApp Message Formatter Format a WhatsApp message with bold, italic, strikethrough, monospace and lists, with a live preview.

Convert

Number Base Converter Convert integers between binary, octal, decimal and hex. Roman Numerals Convert between Roman numerals and decimal numbers. Temperature Converter Convert between Celsius, Fahrenheit and Kelvin. Color Converter Convert colors between HEX, RGB, HSL and more. Fuel Economy Converter Convert fuel economy between km/L, L/100 km and US or UK MPG. CLI Table Converter Turn aligned terminal output such as docker ps or df into a Markdown table, CSV or TSV. Google Maps Link Parser Pull the latitude and longitude out of a Google Maps link and export it as JSON, CSV, SQL or GeoJSON.

Math

Math Evaluator Evaluate a mathematical expression, with variables and functions. ETA Calculator Estimate a finish time from progress, elapsed time and remaining work. Percentage Calculator Work out percentages, increases and decreases. Interest Calculator Calculate deposit or loan interest after tax, with flat, effective, annuity, compound, tiered, step-up and floating methods. Indonesian Tax Calculator Calculate selected Indonesian tax scenarios with exact arithmetic, rule references and explicit historical coverage limits. Take-Home Pay Calculator Estimate Indonesian net salary from gross pay, with PPh 21 and the employee share of BPJS broken out. Loan Calculator Work out a fixed-rate loan payment, its amortisation schedule and the interest saved by paying extra. Date Calculator Add or subtract days, weeks, months and years, or measure the duration and business days between two dates. Chronometer A simple stopwatch with laps. Benchmark Builder Compare a set of measured values and their ratios. Random Generator Pick from a list with a spin wheel, slot machine, random card, dice or ticker animation. Discount Calculator Work out a final price, a discount percent, or the original price from a discount and a final price. Unit Price Comparator Compare products by unit price so different pack sizes can be ranked on the same scale. Age Calculator Work out an age in years, months and days, with totals and the next birthday.

Data

SQL Insert Generator Turn JSON or CSV rows into SQL INSERT statements for MySQL, PostgreSQL, SQLite or SQL Server. Email Normalizer Normalize email addresses to a canonical form. Phone Parser Parse and format phone numbers by country. IBAN Validator Validate an IBAN and read its country and check digits. NIK Parser Parse Indonesian NIK into region codes, birth date, gender and serial number. JSON Schema Validator Validate a JSON document against a JSON Schema (draft-07 subset) and list every problem with its JSON Pointer path. JSON Path Explorer Evaluate JSONPath expressions against JSON, list every match with its path, and build expressions by clicking a tree. CSV Viewer Open a CSV, TSV or pipe-separated file, filter it and sort it column by column in a table. CSV and JSON Converter Convert CSV to JSON, or JSON back to CSV, with configurable delimiter and pretty-printing.

Games

Typing Speed Test Measure WPM and accuracy with live per-character feedback and a restartable test. Gamepad Tester See every axis and button of a connected controller, with the pressed buttons lit up. 2048 Slide and merge numbered tiles to reach 2048, with undo, best score and keyboard or swipe controls. Memory Match Flip cards and find matching pairs, with move count, timer and difficulty levels. Minesweeper Clear a grid without hitting a mine, with flags, first-click safety and difficulty levels. Snake Steer a growing snake to eat food without hitting the walls or yourself. Tetris Stack falling tetrominoes and clear lines, with next-piece preview, hold and levels. DevOps Tycoon Manage servers, traffic and incidents as a DevOps engineer — buy capacity, survive outages and keep the service profitable.

For AI assistants: tools.json search-index.json llms.txt MCP server