Free tools for everyday data cleanup.
Clean CSV, compare JSON, convert YAML, format SQL, decode tokens, count AI prompt tokens, optimize images, convert dates, and estimate file or hardware needs without creating an account.
Text Tools
Clean, compare, format, and convert structured data.
Work directly with CSV, JSON, YAML, SQL, URLs, AI prompt tokens, schedules, and timestamps from focused browser-side editors.
Date Format Converter
Convert dates, timestamps, and common formats in bulk.
Unix Timestamp Converter
Convert seconds, milliseconds, microseconds, and nanoseconds to local and UTC time.
ISO 8601 Date Converter
Validate ISO strings and convert them to local time, UTC, offsets, and Unix seconds.
Excel Serial Date Converter
Convert Excel serial dates with Windows 1900 and Mac 1904 date-system support.
Time Zone Converter
Convert a local date and time between IANA time zones, UTC, and Unix seconds.
Age Calculator
Calculate exact age, days lived, weekday born, and next birthday countdown.
Date Difference Calculator
Compare two dates by calendar span, total time, and weekday business days.
Business Days Calculator
Add or subtract workdays while excluding weekends, US holidays, and custom dates.
Week Number Calculator
Find ISO week, US week, day of year, quarter, and ISO week boundaries.
Cron Expression Parser
Validate 5-field cron expressions and preview the next 10 local run times.
JSON Data Extractor
Pull nested values and inspect structured JSON without writing a script.
JSON Formatter
Beautify, minify, validate, and copy JSON from a focused editor.
JSON to CSV
Flatten JSON records into clean CSV for spreadsheets and exports.
CSV to JSON
Turn delimited rows into structured JSON arrays with browser-side parsing.
CSV Delimiter Converter
Convert CSV between comma, tab, pipe, semicolon, and custom delimiters.
CSV Cleaner
Trim cells, remove empty rows, dedupe records, and sort CSV locally.
CSV to Markdown Table
Create GitHub-ready Markdown tables from pasted CSV data.
JSON Diff
Compare JSON objects and find added, removed, and changed paths.
JSONPath Tester
Run JSONPath expressions against pasted JSON and inspect matched values.
YAML to JSON / JSON to YAML
Convert configuration snippets between YAML and JSON in your browser.
SQL Formatter
Beautify SQL queries for PostgreSQL, MySQL, BigQuery, SQLite, and more.
Base64 Encoder Decoder
Encode and decode Base64 strings, including URL-safe Base64.
JWT Decoder
Decode JWT headers and payloads locally without signature verification.
Token Counter for GPT, Claude, and Gemini
Count GPT tokens and estimate Claude or Gemini prompt tokens locally.
UUID Generator Validator
Generate UUID v4 values and validate pasted UUID strings.
URL Encoder Decoder
Encode, decode, and clean URL strings for requests and redirects.
File Tools
Drop files in, convert, resize, and optimize locally.
Use browser-side file tools for images, SVG markup, AVIF conversion, and spreadsheets.
WebP Image Converter
Bulk convert JPG, PNG, GIF, AVIF, SVG, ICO, BMP, and WebP files locally.
AVIF Converter
Convert images to AVIF or export AVIF back to common web formats.
PNG JPG WebP Optimizer
Compress and resize PNG, JPG, JPEG, and WebP files in your browser.
SVG Optimizer
Minify SVG markup, remove comments and metadata, and preview output.
Image Resize Compress
Resize, compress, and optionally convert image files locally.
Excel to JSON
Drop in a spreadsheet and convert sheet data into JSON locally.
Hardware Tools
Plan storage, transfers, media sizes, and GPU memory needs.
Estimate capacity, units, network time, bitrate, redundancy, and model memory requirements before buying or configuring hardware.
VRAM Calculator
Estimate GPU memory requirements for models and quantization choices.
RAID Calculator
Compare usable capacity, redundancy, and disk requirements.
Storage Size Converter
Convert GB vs GiB, MB vs MiB, TB vs TiB, and raw bytes.
File Transfer Time Calculator
Estimate upload, download, backup, and migration time from size and speed.
Bitrate File Size Calculator
Calculate media file size, bitrate, or duration for audio and video.
Browser-first
All active tools run client side, keeping the site fast, simple, and private.
No account wall
Open a tool, use it, and leave. No login, dashboards, subscriptions, or saved workspace.
Built for quick fixes
These are focused utilities for developers, analysts, operators, and anyone cleaning up data by hand.
Useful tools, kept lightweight.
If a tool saved you a few minutes, the coffee button helps cover hosting and maintenance without adding ads or accounts.