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72 tools available
Showing 72/72 tools · All tools
One-Minute Reaction Challenge
An instant daily reflex game: hit pulse targets, avoid red decoys, and test your combos, accuracy, and reaction speed as the tempo rises for 60 seconds.
Game Tools
Cloud Star Catcher
An easygoing catch game: guide a cloud beneath falling stars, dodge raindrops, and build a combo to unlock Rainbow Time during a 75-second round.
Game Tools
JSON Formatter
Turn minified, messy, or hard-to-read JSON into a scannable hierarchy with error hints and field statistics.
Developer Tools
Code Formatter & Minifier
Format or minify JSON, SQL, HTML, CSS, JavaScript, TypeScript, and XML with language-aware parsing, syntax highlighting, auto-detection, dialect options, and local drafts.
Developer Tools
JSON Diff
Compare large JSON locally in the background with keyed object-array matching, three-way merging, JSON Schema validation, and a complete Patch workflow.
Developer Tools
JSONPath Query
Query large JSON locally with JSONPath, source location, table views, query history, and result exports.
Developer Tools
JSON Schema Validator
Validate JSON Schema locally with multiple drafts, multi-file references, issue location, sample generation, and bundle exports.
Developer Tools
JSON to Data Model
Generate TypeScript, Go, Java, and Python data models from JSON samples, JSON Schema, OpenAPI 3.x, or Swagger 2.0 while preserving required, nullable, enum, format, and nested structure semantics.
Developer Tools
OpenAPI / Swagger Inspector
Parse OpenAPI 3.0, 3.1, and Swagger 2.0 locally, explore endpoints, inspect conventions, resolve multi-file references, and generate examples and curl commands.
Developer Tools
WebSocket Inspector
Connect to ws/wss services in the browser, exchange text, JSON, and binary messages, and manage heartbeats, reconnects, filters, and session history.
Developer Tools
SQLite Playground
Create, open, query, and export SQLite databases locally with SQLite WebAssembly. Your data never leaves the browser.
Developer Tools
PostgreSQL Playground
Create, query, learn, and back up a local PostgreSQL database with PGlite WebAssembly, including schemas, JSONB, arrays, CTEs, and window functions.
Developer Tools
DuckDB Analytics Playground
Analyze CSV, TSV, JSON, NDJSON, and Parquet locally with DuckDB-Wasm, run analytical SQL, manage .duckdb databases, and learn DuckDB through interactive lessons.
Developer Tools
Data File Workbench
Open CSV, TSV, JSON, NDJSON, Excel, and Parquet locally, then profile fields, filter and sort rows, handle missing values, deduplicate, convert types, and export to multiple formats.
Data & Spreadsheets
Dynamic Ranking Chart Studio
Import CSV, Excel, or JSON to create animated horizontal rankings and line charts with smooth Top N transitions, avatars, branded themes, a timeline, and local high-resolution image and video export.
Data & Spreadsheets
CSV to JSON Converter
Open or paste CSV data, inspect headers and detected types, clean rows, and export formatted JSON without uploading files.
Data & Spreadsheets
JSON to CSV Converter
Open or paste JSON, flatten nested objects, inspect columns, clean records, and export CSV locally in your browser.
Data & Spreadsheets
Arcade Emulator
Run arcade ROMs in your browser with FBNeo and MAME 2003 Plus cores, touch controls, landscape fullscreen, saves, keyboards, and multiple gamepads.
Game Tools
FC Emulator
Run NES/FC games locally in your browser with ROM upload and URL loading, touch controls, landscape fullscreen, vibration, multiple gamepads, and two-player keyboard mapping.
Game Tools
Text Diff
Compare text or code locally with line, word, and character highlighting, split and unified views, change merging, and Patch export.
Developer Tools
Timestamp Converter
Detect second and millisecond timestamps, then switch quickly between local time and UTC.
Date & Time
World Clock
Track global city times and daylight in real time, with a customizable clock board, timezone search, meeting planner, date-change cues, and immersive fullscreen clocks.
Date & Time
Date Calculator
A complete date workspace for exact date differences, date arithmetic, custom business days, excluded dates, date facts, calendar ranges, and live countdowns.
Date & Time
Unit Converter
A complete converter for 20 categories including length, mass, temperature, area, volume, speed, data, pressure, and energy, with batch conversion, smart precision, comparison tables, favorites, and history.
Calculators & Converters
Comprehensive Calculator
A complete local calculation workspace with safe expressions, scientific functions, BigInt programmer operations, descriptive statistics, quadratic and linear-system solvers, and interactive graphing.
Calculators & Converters
Loan & Extra Payment Calculator
Calculate level-payment and equal-principal loans, model extra payments, stress-test rates, estimate affordability, inspect every payment, and export a CSV schedule.
Calculators & Converters
Personal Budget & Savings Planner
Compare planned and actual spending, project savings goals and an emergency fund, and explore debt avalanche and snowball plans with local, portable data.
Productivity & Habits
Pomodoro Focus Timer
A complete Pomodoro workspace with task planning, automatic cycles, immersive fullscreen, ambient sound, notifications, daily goals, and local focus stats.
Date & Time
Multi Timer
An all-in-one timing workspace with reliable background countdowns, a precise stopwatch, configurable interval cycles, parallel timers, fullscreen display, and completion alerts.
Date & Time
Habit Tracker
Build consistent routines with daily, weekday, custom-day, and weekly-frequency goals, plus quick check-ins, a calendar heatmap, streaks, and useful progress insights.
Productivity & Habits
Time Blocking Planner
Turn tasks into an actionable day with a draggable timeline, weekly planning, recurring blocks, an unscheduled inbox, focus timing, reusable templates, and review insights.
Productivity & Habits
Eisenhower Matrix
Separate important work from urgent noise with a visual matrix, today view, subtasks, recurring tasks, bulk organization, practical insights, and local backups.
Productivity & Habits
Goal & OKR Planner
Break long-term direction into outcomes you can execute and review with objectives, weighted key results, milestones, actions, health signals, check-ins, and a visual roadmap.
Productivity & Habits
Cron Expression Parser
Parse 5-field Unix cron and 6-field cron expressions with seconds, then show field meanings, upcoming run times, and risk hints.
Date & Time
Password Generator
Generate passwords by length, character type, and readability preferences for accounts, temporary secrets, and shared credentials.
Security & Privacy
ID Generator & Parser
Generate UUID v4/v7, ULID, NanoID, and Snowflake IDs in one place, with batch export, time ordering, custom Snowflake layouts, and field-level parsing.
Developer Tools
Faker Identity Generator
Use faker-js/faker locally in your browser to generate names, identity documents, contacts, addresses, jobs, online profiles, and financial test data, including U.S. states with no statewide sales tax.
Developer Tools
Structured Mock Data Generator
Design a single table or a relational dataset locally in your browser and generate localized data with faker-js/faker. Supports foreign keys, dependency ordering, nested fields, uniqueness, null probability, ranges, enums, templates, and sequences, plus relational SQL DDL, multi-sheet Excel, JSON, CSV, TSV, YAML, and XML exports.
Developer Tools
JWT Decoder
Split JWT Header, Payload, and Signature locally, explain common claims and expiry, and verify HMAC, RSA, and ECDSA signatures.
Security & Privacy
Codec Workbench
Encode and decode Base64, URL, HTML Entity, Unicode, Hex, and more in the browser. Useful for API tokens, data URLs, escaped text, and transport fields.
Encoding
QR Code Tool
Generate text, URL, WiFi, and contact QR codes locally in the browser, or upload an image to decode a QR code.
Encoding
Regex Tester
Debug regular expressions locally in the browser with flags, match highlighting, capture groups, named groups, and replacement preview.
Developer Tools
Color Tool
Enter HEX, RGB, HSL, or HSV colors to convert formats, generate ramps and harmonies, and check WCAG text contrast.
Text Processing
Universal Video Player
Play local video, direct media URLs, HLS/M3U8, common FLV streams, and torrents in your browser. Use local compatibility mode only when MKV, RMVB, or another legacy file cannot play directly.
Audio & Video
Audio & Video Workbench
Trim and compress video, turn clips into GIFs, extract audio, and convert audio formats locally in your browser with one consistent preview, settings, and export workflow.
Audio & Video
Online Video Cutter
Preview a video, set exact start and end times, and export MP4 or WebM with optional quality, resolution, and audio controls—without uploading the file.
Audio & Video
Online Video Compressor
Compress video with visual-quality, maximum-resolution, format, and audio controls. Compare source and output sizes before downloading, entirely in your browser.
Audio & Video
Video to GIF Converter
Choose up to 30 seconds of video, then control frame rate, width, and palette size to generate a looping GIF locally in your browser.
Audio & Video
Extract Audio from Video
Extract a video audio track locally as MP3, WAV, M4A, OGG, or FLAC, with optional bitrate, sample-rate, and channel controls.
Audio & Video
Online Audio Converter
Convert common audio files or the audio track in a video, with custom bitrate, sample rate, mono, and stereo controls plus instant result playback.
Audio & Video
Image Compressor
Compress PNG, JPG, and WebP images locally in the browser with quality, size, and format controls.
Image Tools
Image Base64 Converter
Convert images to Data URLs or raw Base64 locally in your browser, or paste Base64 to restore, preview, and download an image.
Image Tools
Image Watermark
Add text or logo watermarks locally in your browser with nine-point placement, tiling, opacity, rotation, and batch ZIP export.
Image Tools
Image Crop & Resize
Crop images by dragging locally in your browser, apply common ratios, rotate or flip, set exact dimensions, and export PNG, JPEG, or WebP.
Image Tools
Image EXIF & Metadata
Read EXIF, GPS, XMP, IPTC, and ICC data from regular images and HEIC / HEIF files locally, identify privacy risks, and batch-export clean images with metadata removed.
Image Tools
Batch Image Format Converter
Batch-convert HEIC / HEIF, JPG, PNG, WebP, and other images locally in your browser with quality, sizing, transparency handling, and ZIP downloads.
Image Tools
HEIC to JPG Converter
Decode HEIC and HEIF photos locally, control JPEG quality and dimensions, remove attached metadata, and download individual files or a ZIP.
Image Tools
Image Stitch & Long Image
Stitch images vertically, horizontally, or in a grid, or automatically detect scrolling screenshot overlaps and remove duplicate content locally in your browser with HEIC support, drag sorting, and flexible exports.
Image Tools
Markdown Preview
Switch quickly between input and preview for README files, announcements, article drafts, and technical docs.
Text Processing
MD2Card
Transform Markdown into polished cards for Xiaohongshu, WeChat, and Douyin with smart pagination, original themes, and local image export.
Text Processing
Content Workbench
Organize product value, audience, and calls to action into ready-to-use drafts for Xiaohongshu, Douyin, WeChat, and TikTok, then copy or download the complete content kit.
Text Processing
Network Diagnostics Toolbox
A complete network workbench for developers and operators: query DNS records, inspect HTTP headers and redirect chains, audit SSL/TLS certificates, and calculate IPv4/IPv6 CIDR subnets.
Network Tools
URL Encoder & Parser
Split long URLs into path, query parameters, and hash; sort, encode, decode, and copy parameters quickly.
Network Tools
Online Whiteboard
A lightweight blackboard and whiteboard that runs entirely in your browser, with pressure-sensitive ink, pens, a highlighter, an eraser, undo and redo, local autosave, and high-resolution PNG export.
Productivity & Habits
Local Reader Workbench
Read PDF, EPUB, TXT novels, and CBZ/ZIP comics without uploading or signing in, with a local library, reading progress, contents, bookmarks, read aloud, and flexible layouts.
Productivity & Habits
Online Archive Extractor
Browse archive folders, preview common files, and selectively extract ZIP, 7Z, RAR, TAR, GZIP, BZ2, XZ, and more without uploading anything.
File Tools
Online File Compressor
Select multiple files or a complete folder, preserve its structure, choose a compression level, and create ZIP or TAR.GZ locally without uploading anything.
File Tools
PDF Toolkit
Manage PDF pages locally in the browser with multi-file merging, page removal, rotation, drag sorting, and export.
PDF Tools
PDF Compressor
Compress PDF pages locally with quality and resolution presets, optional grayscale output, and a before-and-after size preview.
PDF Tools
PDF to Images Converter
Open a PDF, select the pages you need, preview them, and export page images locally without sending the document to a server.
PDF Tools
Images to PDF Converter
Add multiple images, arrange their order, choose page size and fit behavior, then create a PDF entirely in your browser.
PDF Tools
Historical World Map
Resolve calendar years, Chinese era names, and a historical person’s age into a time-aware world map of major polities, territories, rulers, era names, and known activity locations, with provenance and uncertainty shown clearly.
History & Humanities
Complete ToolRen directory
Browse every tool by category, name, or task
This directory contains every published ToolRen utility. Search for a format or workflow, narrow the list by category, and open the exact tool you need without navigating through unrelated product pages.
Compare within a category
Category pages keep related workflows together, making it easier to choose between a focused converter and a broader workbench.
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FAQ
How many tools are in the ToolRen directory?
The current public directory contains 72 tools across 15 task-focused categories.
How can I find a specific utility?
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