Column to Comma Separated List
Join one-per-line values into a single comma delimited line, with presets for SQL IN lists, JSON arrays and Python lists.
Runs in your browser
Small text tools that respect your data
Every tool on PartToolHub runs entirely in your browser. There is no upload, no account and no waiting: paste, adjust, copy. The box on the right is a real one, not a screenshot.
Your tools
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Converters & Formatters
Reshape data from one form into another without leaving the browser.
Comma Separated List to Column
Split comma, semicolon, pipe or tab delimited text into one item per line; the separator is detected automatically.
JSON Formatter & Validator
Beautify or minify JSON and see exactly where a syntax error is.
Python Dict to JSON
Paste a printed Python dict and get valid JSON with proper quotes, true/false and null.
JSON to Python Dict
Paste JSON and get a Python literal back, ready to assign to a variable or paste into a REPL.
Unix Timestamp Converter
Convert between Unix time and a human date, with explicit control over seconds/milliseconds and time zone.
Date Difference Calculator
Find the exact gap between two dates: a calendar breakdown plus totals in weeks, days, hours and weekdays.
Data Size Converter
Convert between bytes, KB, MB, GB, TB and PB, with decimal and binary shown separately instead of conflated.
CSV to JSON Converter
Turn a CSV file into a JSON array of objects, with type detection and a custom delimiter.
JSON to CSV Converter
Turn a JSON array into a CSV file, ready to open in a spreadsheet.
Color Converter
Paste a HEX, RGB or HSL color and get every format back, plus its contrast ratio against black and white.
Number Base Converter
Paste an integer in any base and get binary, octal, decimal and hex back at once.
Aspect Ratio Calculator
Get the simplified ratio of any width and height, then scale a new dimension to match it.
HTML to Markdown
Paste HTML source and get GitHub-flavored Markdown back, with the structure kept and stray symbols escaped.
SQL Tools
Lay out, check and generate SQL text without connecting to a database.
SQL Formatter
Lay out SQL with one clause per line and indented subqueries, or minify it to one line. Points out unclosed quotes and stray commas.
CSV to SQL Converter
Turn CSV rows into INSERT statements and a CREATE TABLE with detected column types, with quotes escaped the way your database expects.
JSON to SQL Converter
Turn a JSON array of objects into INSERT statements and a CREATE TABLE, keeping nested objects as JSON or flattening them into columns.
Text Tools
Fix, clean and tidy plain text in one paste.
Code Case Converter
Paste one identifier or phrase and get every common programming case style back at once.
Title Case Converter
Capitalize headlines and titles by style guide, or switch to sentence, upper or lower case.
AI Text Cleaner
Strip Markdown, em dashes, smart quotes, emoji, citations and hidden characters from AI output.
Remove Duplicate Lines
Keep only unique lines from a list, with case-insensitive and trimming options.
Markdown to Plain Text
Strip Markdown from an AI answer but keep its structure, or rewrite it as Slack, WhatsApp or Google Chat markup.
Markdown to Google Docs
Convert Markdown to formatted text you can paste straight into Google Docs, Word, Gmail or Teams.
Markdown to Word
Paste Markdown and download an actual .docx file: headings, lists, tables and links are all real Word elements, not a pasted approximation.
Google Docs to Markdown
Paste formatted text copied from Google Docs, Word or a web page and get Markdown with its structure intact.
Encoders & Decoders
Encode, decode and inspect tokens and strings.
JWT Decoder
Inspect the header, claims and expiry of a JSON Web Token without sending it anywhere.
Base64 Encode / Decode
Convert text to Base64 and back, including UTF-8 and URL-safe variants.
Base64 to Image
Paste Base64 or a data URI, see the image, check its real format and size, and download it.
Image to Base64
Drop, pick or paste an image and copy it as raw Base64, a data URI, an <img> tag or a CSS url().
URL Encode / Decode
Percent-encode query values or whole URLs, or decode them back to plain text.
Generators
Produce a random or structured value on demand, instead of converting one you already have.
UUID Generator
Generate one or many UUIDs: version 4 for random, version 7 for time-sortable IDs.
Password Generator
Pick the length, character types and quantity, then generate cryptographically random passwords with a real entropy and strength readout.
Lorem Ipsum Generator
Generate placeholder Latin text by words, sentences or paragraphs for mockups, layouts and templates.
Compare & Diff Tools
See exactly what changed between two versions of anything, without either one leaving your browser.
Text Diff Checker
Paste two versions of text or code and see every line and word that changed, entirely in your browser.
JSON Diff Checker
Compare two JSON documents by key path, so reordering or re-indenting never shows as a false change.
Why these tools exist
Reshaping data or text is a two-minute job that somehow eats twenty: open an editor, fiddle with find-and-replace, fix the stray trailing comma, repeat. Each tool here does one job well, shows you the result as you type, and stays out of your way.
- Private by design. The pages are static files; the conversion is plain JavaScript on your device.
- Fast on any connection. No frameworks to download, no round-trips to a server.
- Honest about what changed. Counters tell you how many items went in, came out and were dropped.
- Documented from real input. Each tool page lists the edge cases and error messages you will actually hit, and the date it was last checked against the running tool.
The site is built and maintained by Parthesh Gupta; the about page explains how the tools are tested and how the site is funded.