Gratis online tools
268+ free online tools for PDF, images, SEO, developers, color, and productivity. Fast, browser-based, and private — no signup, no installs, no limits. Search above or browse by category below.
Total tools26810.9K total uses
Categories13Active categories
Most usedJSON Formatter4.1K uses
Recently addedExperiment RandomizerNewest tool
CSV to JSON
Convert CSV spreadsheets to JSON arrays with header detection, type parsing, and dot-key unflattening.
Used 1 times•Updated 17 minutes ago
Grid Generator
Configure CSS Grid layouts with live preview and copy-ready CSS, inline styles, and Tailwind classes.
Used 1 times•Updated 8 minutes ago
AES Encrypt
Encrypt and decrypt text with AES-GCM or AES-CBC using a passphrase or hex key, entirely in your browser.
Used 1 times•Updated 26 minutes ago
AES Decrypt
Decrypt AES-GCM or AES-CBC JSON payloads using the passphrase or hex key that was used to encrypt them.
Used 1 times•Updated 34 minutes ago
RSA Encrypt
Encrypt and decrypt text with RSA-OAEP public/private keys, including hybrid mode for longer messages.
Used 1 times•Updated 36 minutes ago
DNS Lookup
Query public DNS records for any domain — A, AAAA, MX, TXT, NS, CNAME, SOA, SRV, CAA, and PTR.
Used 1 times•Updated 13 minutes ago
Excel to CSV
Convert Excel spreadsheets (XLSX, XLS, ODS) to CSV in your browser, with per-sheet selection and delimiter options.
Used 1 times•Updated 15 minutes ago
Age Calculator
Calculate exact age in years, months, and days from a birth date, with next birthday countdown.
Used 1 times•Updated 6 minutes ago
Loan Calculator
Calculate monthly loan payments, total interest, and a full amortization schedule for any loan.
Used 1 times•Updated 13 minutes ago
Break Even Calculator
Find how many units or how much revenue you need to cover fixed costs and break even.
Used 1 times•Updated 26 minutes ago
Time Calculator
Calculate time differences and add or subtract hours, minutes, and seconds from any clock time.
Used 1 times•Updated 17 minutes ago
Invoice Generator
Create professional invoices with line items, tax, and totals — preview, print, or download as PDF.
Used 1 times•Updated 31 minutes ago