Base64 encoder
Encode or decode Base64 in the browser, including Unicode text.
Developer
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Search by the job you need to do. Filters stay in the address bar, so you can share or return to the same view.
23 tools
Base64 encoder DMARC record checker DMARC record checker
Read the DMARC policy at _dmarc. This does not prove mail will be delivered.
Email
DNS lookup DNS lookup
Look up public DNS records for a domain. Kiln does not connect to the host.
Network
Email syntax validator Email syntax validator
Check whether an email address is formatted correctly. This does not prove the mailbox exists.
Email
HTTP header checker HTTP header checker
Show the status and response headers for one public URL. Redirects are not followed.
Network
Image compressor Image compressor
Compress an image in the browser and compare the file size before and after.
Images
Image converter Image converter
Convert an image to PNG, JPEG, WebP, or AVIF when this browser can encode that format.
Images
Image resizer Image resizer
Resize a PNG, JPEG, WebP, GIF, or AVIF image in the browser and download the result.
Images
JSON formatter JSON formatter
Check JSON, then format or minify it in the browser.
Developer
JWT decoder JWT decoder
Decode a JWT header and payload in the browser. The signature is not verified.
Developer
Meta tag checker Meta tag checker
Read the title, description, canonical URL, and robots meta tag from one public page.
SEO
MX record checker MX record checker
See the mail servers a domain publishes. This does not prove a mailbox exists.
Email
Open Graph preview Open Graph preview
Read the Open Graph and Twitter card fields for one public page. The image is not downloaded.
SEO
QR code generator QR code generator
Create a QR code from text or a URL and download it as PNG or SVG.
Images
Redirect checker Redirect checker
Follow up to five public redirects and list each hop. A private destination is not contacted.
Network
Regex tester Regex tester
Test a JavaScript regular expression, highlight matches, and copy the groups.
Text
SPF record checker SPF record checker
Read and explain the SPF policy a domain publishes. This does not prove mail will be delivered.
Email
Text case converter Text case converter
Change text to upper, lower, title, sentence, camel, pascal, snake, or kebab case.
Text
Text diff Text diff
Compare two texts and see added and removed lines.
Text
Unix timestamp Unix timestamp
Convert a Unix timestamp to a date, or an ISO 8601 date to a timestamp.
Developer
URL encoder URL encoder
Encode or decode a URL component or a full URI in the browser.
Developer
Word and character counter Word and character counter
Count words, characters, sentences, and paragraphs as you type.
Text
XML sitemap analyzer XML sitemap analyzer
Report the size, URL distribution, missing dates, and duplicates in one sitemap. Child sitemaps are listed, not fetched.
SEO