All 42 Toolbit developer tools

Every Toolbit utility, grouped by what it does. Each one runs entirely in your browser: nothing is uploaded, nothing is tracked, and everything keeps working offline once the app is installed.

• JSON Formatter
• JWT Decoder
• Base64 Encoder & Decoder
• Regex Tester
• UUID Generator
• YAML Formatter
• SQL Formatter
• Hash Generator

JSON, YAML & Format Tools

Beautify, minify, and validate the structured formats you read all day.

• JSON Formatter Format, validate and beautify JSON instantly. Pretty-print, minify, sort keys, and explore a tree view. Runs locally…
• JSON Validator Validate JSON against a JSON Schema and get every error with its exact path. Draft 2020-12 support, running locally…
• CSS Formatter Beautify or minify CSS with consistent indentation and sorted declarations. Runs locally in your browser, no uploads.
• YAML Formatter Format and validate YAML, and convert between YAML and JSON in both directions. Runs locally in your browser with no…
• XML Formatter Format, minify, and validate XML, convert it to JSON, and run XPath queries. Runs locally in your browser with no…
• SQL Formatter Format and beautify SQL queries with proper indentation and keyword casing. Supports MySQL, PostgreSQL, and standard…
• GraphQL Formatter Format, validate, and minify GraphQL queries, mutations, and SDL schemas. Runs locally in your browser with no…
• Nginx Config Validator Validate, format, and analyse nginx configuration files. Catch unbalanced braces and missing semicolons before you…

Encoding & Token Tools

Encode, decode, and inspect Base64, URLs, JWTs, certificates, and wire formats.

• Base64 Encoder & Decoder Encode text to Base64 and decode Base64 back to text, with URL-safe and UTF-8 support. Runs locally inside your…
• URL Encoder & Decoder Percent-encode and decode URLs and query strings, with component and full-URI modes. Runs locally in your browser, no…
• HTML Escape & Unescape Escape HTML special characters to entities and unescape them back. Useful for templates, docs, and XSS-safe output.…
• Protobuf Decoder Decode raw Protocol Buffer wire-format bytes into readable fields without a .proto file. Runs locally in your…
• JWT Decoder Decode a JWT and inspect its header, payload, and expiry. Tokens are decoded in your browser and never uploaded to a…
• Certificate Decoder Decode PEM-encoded X.509 certificates and read subject, issuer, validity dates, SANs, and fingerprints. Runs locally…

Generators

Produce identifiers, hashes, passwords, QR codes, and realistic test data.

• Lorem Ipsum Generator Generate lorem ipsum paragraphs, sentences, words, or list items for mockups and layout tests. Runs locally in your…
• Hash Generator Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text or files. Computed in your browser — nothing is uploaded.
• Password Generator Generate strong random passwords with configurable length and character sets, plus a strength meter. Generated…
• TOTP Generator Generate time-based one-time passwords from a TOTP secret, entirely offline. Compatible with Google Authenticator and…
• UUID Generator Generate cryptographically random v4 UUIDs one at a time or in bulk, with formatting options. Runs locally in your…
• Fake Data Generator Generate realistic names, emails, addresses, and IDs as JSON, CSV, or SQL inserts. Runs locally in your browser.
• QR Code Generator Generate QR codes for URLs, plain text, WiFi credentials, and contact cards. Rendered in your browser and never…

Converters

Move data between formats, units, colours, timestamps, and cases.

• CSV to JSON Converter Convert CSV and TSV data into clean JSON arrays or objects. Handles quoted fields, custom delimiters, and headers.…
• Case Converter Convert text between camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, and Title Case. Runs locally in…
• JavaScript & JSON Minifier Minify JavaScript and JSON to the smallest safe output, with a size comparison. Runs locally in your browser with no…
• Timestamp Converter Convert Unix timestamps to human-readable dates and back, in seconds or milliseconds, across time zones. Runs locally…
• Color Converter Convert colours between HEX, RGB, HSL, and HSV with a live preview and contrast check. Runs locally in your browser.
• Unit Converter Convert between units of length, mass, volume, temperature, digital storage, and more. Runs locally in your browser.
• Image Converter Convert, resize, and compress images between PNG, JPEG, and WebP entirely in your browser. Images are never uploaded.

Inspect & Compare

Test regular expressions, diff text, read git patches, and decode schedules.

• Word Counter Count words, characters, sentences, paragraphs, and reading time as you type. Runs locally in your browser with no…
• Text Diff Tool Compare two blocks of text side by side and see every addition, deletion, and change highlighted. Runs locally in…
• Git Diff Viewer Paste unified diff or git patch output and read it with syntax highlighting and per-file navigation. Runs locally in…
• Regex Tester Test regular expressions with live match highlighting, capture groups, and replace preview. Runs locally in your…
• Cron Expression Parser Translate a cron expression into plain English and preview the next run times. Runs locally in your browser with no…
• HTTP Status Code Reference A searchable reference for every HTTP status code, with meaning, typical causes, and when to use each one. Works…

API & Command Builders

Compose HTTP requests, WebSocket sessions, cron entries, and Docker commands.

• API Request Builder Send HTTP requests and inspect status, headers, timing, and body. A fast, local Postman alternative that runs in your…
• WebSocket Tester Open a WebSocket connection, send messages, and watch frames arrive in real time with timestamps. Runs in your…
• Crontab Generator Build a cron expression visually with a live plain-English preview and upcoming run times. Runs locally in your…
• Docker Command Builder Build docker run commands and docker-compose files visually, with ports, volumes, and environment variables. Runs…

Text & Document Tools

Clean up text, preview Markdown, work with PDFs, and do date maths.

• Whitespace Remover Trim trailing spaces, collapse blank lines, normalise indentation, and strip invisible characters. Runs locally in…
• Markdown Previewer Write Markdown and see the rendered result live, with GitHub-flavoured tables, code blocks, and task lists. Runs…
• PDF Tools Merge, split, rotate, and reorder PDF pages entirely in your browser. Documents are never uploaded to a server.
• Date Calculator Calculate the difference between two dates, or add and subtract days, weeks, and months. Runs locally in your browser.