More Developer Tools
233 free more developer tools tools in the Developer Tools collection — every one runs in your browser with no signup and no uploads. Page 2 of 3.
Incoterms by Mode of Transport
Which of the 11 Incoterms 2020 rules apply to sea, air, road, and multimodal.
IntelliJ IDEA Keyboard Shortcuts
Look up IntelliJ shortcuts by action or key for macOS and Windows.
Invisible Character Stripper
Remove zero-width spaces, soft hyphens, BOM, and other invisible chars
IP Protocol Numbers
Search IANA IP protocol numbers by number or protocol name.
IPv4/IPv6 CIDR Range Calculator
Enter a CIDR and get network address, broadcast, host range, and usable IPs
IPv6 Address Expander/Compressor
Expand :: compressed IPv6 to full form and compress it back
ISO 3166-2 Country Subdivision Lookup
Find subdivision codes for states, provinces, and regions.
ISO 3166 Alpha-2 Country Code Lookup
Find 2-letter country codes used in URLs, domains, and APIs
ISO 3166 Alpha-3 Country Code Lookup
Look up 3-letter country codes used in passports and databases
ISO 3166-3 Formerly Used Country Codes
Codes for dissolved and merged countries (USSR, Czechoslovakia, etc.)
ISO 3166 Numeric Country Code Lookup
Find 3-digit numeric country codes used in payment and shipping
ISO-8601 Date-Time Parser
Break down an ISO-8601 string into its component fields
JavaScript Array Methods
All Array prototype methods with signature, return type and mutability flag
JavaScript String Methods
Every String prototype method with signature, return type and unicode notes
JMESPath Tester
Test JMESPath expressions for AWS CLI and JSON querying in real time
Kubernetes Admission Webhook Operations
validatingwebhookconfiguration and mutatingwebhookconfiguration fields reference.
Kubernetes Resource Types
All Kubernetes API resource types with shortnames, API group and scope.
Kubernetes Status Conditions
Pod, Node, Deployment and PVC condition types with meaning and fix hints.
Leading Zeros Counter (CLZ)
Count leading zero bits in an integer (CLZ operation)
Linux cgroup v2 Controllers
All cgroup v2 controllers with knobs, units and resource domains.
Linux File Permission Bits
Build chmod modes by toggling rwx and setuid/setgid/sticky, get the octal and ls -l string, decode either way
strace System Call Categories
strace system call families — file, process, memory, signal, network — with -e flags.
localStorage / sessionStorage Inspector
View, search, and flag tracker-pattern keys in your browser web storage
Relative Luminance Calculator
Compute WCAG relative luminance for any RGB or hex color
M3U8 / HLS Playlist Parser
Parse and inspect HLS .m3u8 playlist files — segment list, bandwidths, keys
macOS Keyboard Shortcuts
System-wide macOS shortcuts for Finder, Mission Control, screenshots and more
Magic Number / File Type Detector
Identify a file's true type from its magic bytes, not just its extension.
MessagePack Viewer
Decode MessagePack binary data to readable JSON right in your browser.
MIC Stock Exchange Code Lookup
Find the ISO 10383 Market Identifier Code for any exchange
MP3 / Audio Silence Detector
Find silent segments in an audio file using the Web Audio API
NATO Alphabet & ICAO Digit Pronunciation
Phonetic digits zero through niner used in aviation and military
Notion Keyboard Shortcuts
Every Notion shortcut for editing, navigation and slash commands in one searchable table
Multi-Base Number Display
See any integer simultaneously in binary, octal, decimal, and hex
OAuth 2.0 Error Codes
All OAuth 2.0 and OpenID Connect error codes with description and spec source.
OAuth 2.0 Scope Explainer & Risk Scorer
Paste an OAuth scope string and get a plain-English explanation and privacy risk score.
OGG / Vorbis Metadata Viewer
Read Vorbis comment tags from OGG audio files in your browser
OpenAPI Operation Object Fields
All OpenAPI 3.1 Operation object fields with type, required flag and description.
OpenTelemetry Semantic Conventions
OTel span attribute keys for HTTP, DB, RPC, messaging, exceptions and more.
Patch Applier
Apply a unified-diff .patch to your source text right in the browser.
PDF Form Field Inspector
List every AcroForm field, type, and value in a PDF — locally.
PDF Image Extractor
Extract all embedded images from a PDF as PNG files — no upload.
PDF Metadata Remover
Strip author, creator, and creation-date metadata from PDF files locally
PDF Page Reorder (Drag & Drop)
Drag PDF page thumbnails to reorder them, then download the result
PDF Page Rotator (Local)
Rotate individual or all pages in a PDF by 90° / 180° — no upload
PDF Text Redactor
Find and remove sensitive text from a PDF, entirely in your browser.
PDF Word Count
Count words, characters, sentences and pages in a PDF — locally in your browser.
Percent / URL Encoding
Encode arbitrary bytes as %XX sequences for URLs
Periodic Table Element Lookup
Search any element by name, symbol, or atomic number
PGP / OpenPGP Key Inspector
Inspect a PGP public key — User IDs, fingerprint, algorithm, subkeys.
Adobe Photoshop Shortcuts
Search Photoshop keyboard shortcuts by tool name or key for Mac and Windows.
PHP Error Levels & Codes
Decode PHP error constants, warning levels and fatal-error codes instantly.
Playwright Locator Methods
All Playwright locator methods with selector syntax and chainability.
macOS / iOS Plist Viewer
View binary or XML plist files from macOS or iOS apps in your browser
Plug & Socket Type by Country
Find which electrical plug type is used in any country.
Adobe Premiere Pro Shortcuts
All Premiere Pro keyboard shortcuts searchable by tool, panel and action
PEM / Private Key Inspector
Inspect a PEM certificate or key — type, algorithm, key size, and expiry.
IETF RFC Quick Index
Search key IETF RFCs by number, keyword or technology for quick citation.
Rust Error Handling Patterns
? operator, unwrap, expect, map_err and thiserror patterns with tradeoff notes.
SAML 2.0 Status Codes
SAML 2.0 top-level and second-level status codes with binding context.
Screw & Bolt Thread Chart
Find pitch and diameter for UNC, UNF, and metric threads
SI Prefix Table
Reference all SI prefixes from yocto to yotta instantly
Slack Keyboard Shortcuts
Search Slack shortcuts by action for navigation, messaging and channel management.
Slugify
Convert any string to a URL-safe lowercase-hyphenated slug
Sublime Text Keyboard Shortcuts
Every Sublime Text shortcut filterable by action, key and OS platform.
TAR / TAR.GZ Inspector
Browse tar and gzipped-tar archive contents without extraction tools.
TCP/UDP Port Lookup
Search well-known, registered and dynamic ports by number or service.
Inline Text Diff Viewer
Compare two strings character-by-character with inline highlights
Stock Ticker Suffix by Exchange
Find the Yahoo Finance / Bloomberg suffix for any exchange
Multi-Timezone World Clock
Show the current time in multiple world timezones simultaneously
Trailing Zeros Counter (CTZ)
Count trailing zero bits in an integer (CTZ operation)
TypeScript Playground (Offline)
Compile TypeScript to JavaScript in your browser — no server, no tsc install
UN/LOCODE Port & Location Code Lookup
Find UN location codes for ports, airports, and rail terminals
Unicode Block Browser
Browse Unicode 15 blocks, search code points by name, block or hex value.
Unicode General Categories
All Unicode general category codes (Lu, Ll, Nd…) with names and character counts.
Unicode Character Inspector
Inspect every Unicode code point in a string — name, block, category.
Unicode NFC Normaliser
Compose Unicode sequences to NFC canonical form
Unicode NFD Decomposer
Decompose precomposed Unicode characters to NFD base + marks
Unicode NFKC Normaliser
Compatibility + composition normalisation — collapses ligatures, widths
Unicode NFKD Decomposer
Compatibility + decomposition — exposes every combining element
Unicode Normalization Forms
NFC, NFD, NFKC, NFKD explained with composition/decomposition rules and use cases.
Unicode Script Codes
ISO 15924 script codes with Unicode alias and sample characters.
UTF-8 Byte Counter
Count the exact number of UTF-8 bytes in any text string
VAT Rate by Country
Standard and reduced VAT/GST rates for every country
Video File Metadata Viewer
Read codec, resolution, duration, and frame rate from video files locally
Video Thumbnail Extractor
Extract frames from a video file at configurable timestamps — no upload
Voltage & Frequency by Country
Check mains voltage and frequency before travelling.
VS Code Keyboard Shortcuts
Search VS Code shortcuts for macOS, Windows and Linux with descriptions.
WAV Header Inspector
Parse WAV/RIFF header to show sample rate, channels, bit depth, and duration
Web Components Lifecycle Callbacks
Custom element lifecycle callbacks with timing and connectedCallback vs constructor
WebGL Error Constants
WebGL error constants (gl.INVALID_ENUM, etc.) with numeric value and cause.
Webpack / Rollup Bundle Stats Visualizer
Visualize a webpack stats.json or rollup bundle as a treemap
WebRTC ICE Candidate Types
WebRTC ICE host, server-reflexive and relayed candidate types with TURN/STUN context.
WebSocket Close Codes
Search WebSocket close codes 1000–4999 with RFC meaning and usage.
Whitespace Normaliser
Collapse multiple spaces, trim, and fix invisible space characters
Windows Keyboard Shortcuts
Search Windows 10 and 11 shortcuts by key, category or action description
Wine Vintage Quality Chart
Quality ratings by year for major wine regions.
Microsoft Word Shortcuts
Search Word shortcuts by action, key or category for Windows and Mac.
Zero-Width Character Steganography
Hide text in zero-width Unicode chars invisible in normal display
ZIP File Inspector
Browse a ZIP archive's contents and metadata without extracting it.
Add Page Numbers to PDF
Stamp page numbers onto every page of a PDF and download the result.