Free 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 tools26810.8K total uses
Categories13Active categories
Most usedJSON Formatter4.1K uses
Recently addedExperiment RandomizerNewest tool
Grid Generator
Configure CSS Grid layouts with live preview and copy-ready CSS, inline styles, and Tailwind classes.
Used 1 times•Updated 57 seconds 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 19 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 27 minutes ago
RSA Encrypt
Encrypt and decrypt text with RSA-OAEP public/private keys, including hybrid mode for longer messages.
Used 1 times•Updated 29 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 6 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 8 minutes ago
Loan Calculator
Calculate monthly loan payments, total interest, and a full amortization schedule for any loan.
Used 1 times•Updated 6 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 19 minutes ago
Time Calculator
Calculate time differences and add or subtract hours, minutes, and seconds from any clock time.
Used 1 times•Updated 10 minutes ago
Invoice Generator
Create professional invoices with line items, tax, and totals — preview, print, or download as PDF.
Used 1 times•Updated 24 minutes ago
Quotation Generator
Create professional price quotations with line items, tax, and validity dates — preview, print, or download as PDF.
Used 1 times•Updated 9 minutes ago
Mole Calculator
Mole calculator free — convert between grams, moles, and particles using molar mass. Instant chemistry stoichiometry in your browser, no signup.
Used 1 times•Updated 10 minutes ago