Free tools for data work.
Fast browser-based utilities for developers, data teams and operators. Convert, test, decode, format and generate common data formats without installing anything.
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Category 01
Data & Formatting
Convert, clean, and structure data for work, analytics, and development.
JSON ↔ CSV Converter
Convert JSON to CSV or CSV to JSON—fast, accurate, and secure.
Open toolFreeCSV Generator
Convert text into a clean CSV instantly. Paste lines, choose quote style, delimiter, and export.
Open toolFreeMarkdown Table Formatter
Convert text or CSV into a perfectly formatted Markdown table with alignment, headers, and live preview.
Open toolFreeData Merge & Dedupe Tool
Deduplicate rows by selected columns and merge remaining values. Works with CSV and Excel—fully client-side.
Open toolFreeData Cleaner
Trim, dedupe, sort, and remove blank lines from messy text.
Open toolFreeCase Converter
Convert text to camelCase, snake_case, Title Case, and more.
Open toolFreeSitemap URL Extractor
Fetch and extract URLs from any sitemap — including numbered sitemap patterns.
Open toolFree
Category 02
Developer Tools
Engineering-grade helpers that speed up backend, frontend, and QA work.
Regex Generator & Tester
Describe a pattern, get a working regex, and test instantly.
Open toolFreeMock Data Generator
Generate fake users, emails, products, addresses, and more.
Open toolFreeUUID / ULID Generator
Generate UUID v1/v4 and ULIDs with one click.
Open toolFreeSQL Query Builder
Build SELECT queries visually and copy the SQL.
Open toolFreeFake API Response Generator
Craft sample JSON API responses for demos and tests.
Open toolFree
Category 03
Security Tools
Simple, developer-friendly tools for encoding and hashing.
JWT Encoder / Decoder
Inspect, decode, and encode JWTs—no upload required.
Open toolFreePassword Generator
Create strong passwords with rules and entropy hints.
Open toolFreeBase64 Encoder / Decoder
Encode and decode Base64 safely in your browser.
Open toolFreeHash Generator (SHA-1/256/512)
Generate cryptographic hashes client-side.
Open toolFreeBcrypt Hash Generator
Generate bcrypt hashes with selectable salt rounds.
Open toolFree
Category 04
Time & Date
Work with timestamps, timezones, and date math in seconds.
Timestamp Converter
Convert Unix epoch to human date—and back.
Open toolFreeTimezone Converter
Convert times across timezones with DST awareness.
Open toolFreeISO Date Formatter
Format dates into ISO 8601, UTC, or custom patterns.
Open toolFreeDate Difference Calculator
Calculate precise durations between two dates.
Open toolFree
Category 05
Text & Content
Create clean, SEO-ready content artifacts and developer-friendly strings.
URL Slug Generator
Turn headlines into clean, SEO-friendly slugs.
Open toolFreeText Rewriter
Rewrite passages for clarity and uniqueness (non-AI).
Open toolFreeEmoji → Unicode Converter
Convert emojis to code points and HTML entities.
Open toolFreeLorem Ipsum Generator
Generate placeholder text by words, sentences, or paragraphs.
Open toolFreeHeadline / Title Generator
Produce punchy, SEO-aware titles for posts and pages.
Open toolFree
Category 06
Random & Creative
Generate names, palettes, and helpful randomness for ideation.
Username Generator
Create unique usernames with styles and keywords.
Open toolFreeStartup Name Generator
Get memorable names for products and companies.
Open toolFreeRandom Picker / Shuffler
Pick a random item or shuffle a full list.
Open toolFreeColor Palette Generator
Build harmonious palettes and export to CSS or JSON.
Open toolFreePrompt Generator
Fresh prompts for writing, art, and creative briefs.
Open toolFree
Category 07
Miscellaneous
Everyday tools and handy utilities that don't fit into other categories.
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