Catalogue d’outils en ligne gratuits

Count words, characters, sentences, paragraphs and estimate reading time.

Calculate net salary from gross (or reverse): PDFO, military levy, ESV.

Encode or decode text and files in Base64 format instantly.

Convert any text into a URL-friendly slug for links, URLs and filenames.

Format, validate, and minify JSON data with syntax highlighting and error detection.

Test website loading speed, response time, page size, and performance.

Check WHOIS information for a domain: owner, registrar, expiration date.

Check a domain's SSL certificate: expiration date, issuer and status.

Convert text between UPPER, lower, Title Case, camelCase, snake_case and more.

Minify and compress CSS stylesheets to reduce file size.

Find the hostname (PTR record) for any IP address.

Calculate your exact age in years, months, and days. Find out your zodiac sign and days until next birthday.

Calculate taxes for Ukrainian sole proprietors: groups 1–4, ESV, single tax, military levy.

Generate MD5, SHA-1, SHA-256 and SHA-512 cryptographic hashes for any text.

Query DNS records (A, AAAA, MX, NS, TXT, CNAME) for any domain.

Compare two texts side by side and highlight the differences between them.

Check HTTP response headers and status code for any website.

Minify HTML code by removing whitespace, comments and redundant attributes.

Encode or decode URLs and query parameters for safe use in web addresses.

Test and debug regular expressions with live match highlighting and group display.

Decode Cron expressions into human-readable language and view upcoming task runs in your selected time zone.

Convert dates and times between time zones and compare times across multiple cities simultaneously.

Create beautiful CSS gradients — linear, radial, or conic. Get ready-to-use CSS and Tailwind code.

Remove duplicate lines from text and optionally sort or count them.