IP CALC

DNS LOOKUP

SUBNET MASK

MAC LOOKUP

IP REPUTATION

WHOIS

External links:

⚠️ Privacy Note: This tool makes an external request to public RDAP registries (rdap.org) to fetch domain data. Do not query sensitive internal hostnames.

BASE64

URL ENCODE

HASH

JWT DECODE

                             URL-safe (use - _ instead of + /)
                             Wrap at 76 chars (MIME)
                             Strip padding
                        

ENCODE FILE

                             Component (safer, encodes more)
                             URI (preserves :/?#@&=+)
                        

HASH FILE

PASSWORD

SSH KEYS

HTTP STATUS

CERT DECODER

UPPERCASE lowercase Numbers Special

Private Key (KEEP SECRET!):

Public Key:

Paste a PEM-encoded certificate. Everything is parsed locally — nothing leaves the browser.

JSON

REGEX

DIFF

COLOR

YAML/JSON

CURL BUILDER

HEADERS

                            Query:
                            
                        

                             Unified
                             Side-by-side
                             Highlight word changes
                             Ignore whitespace
                        

Recognizes ~30 common security, caching, and CORS headers and inlines a 1-line explanation for each.

TIMESTAMP

CRON

CONFIG GEN

COMMANDS

ERROR CODES

CHMOD

Min: Hour: Day: Month: Weekday:

TZ: live preview

                                ▾ Compose full crontab entry
                            

                                    FORMAT:
                                     User crontab (crontab -e)
                                     System (/etc/cron.d/ — includes user column)
                                

JOB NAME (used in comment + log filename): COMMAND TO RUN:

                                        ▸ Environment (the "works in shell, fails in cron" fix)
                                    

cron runs with a near-empty environment by default. Setting PATH explicitly is the fix for "command not found" inside cron. MAILTO="" disables mail entirely; MAILTO=user@host sends output there instead of local mail.

                                    OUTPUT:
                                     Mail (default)
                                     Discard (>/dev/null 2>&1)
                                     Append to log file
                                     Log errors only
                                

Crontab Library (0 jobs)

                                        No jobs added yet. Use + ADD TO CRONTAB above to start building a multi-job file.
                                    

USER

Read (4) Write (2) Execute (1)

GROUP

Read (4) Write (2) Execute (1)

OTHER

Read (4) Write (2) Execute (1)

chmod 644 <file>

ALL SCRIPTS

SYSTEM

DOCKER

NETWORK

FILES

SECURITY

PYTHON SANDBOX

sandbox.py (Runs securely in your browser)

Terminal Output

QR CODE

ASCII BANNER

IMG COLOR

CASE CONVERT

BARCODE

EXIF

UUID

FONT:

Click any pixel on the image to sample its color. All processing is local — your image never leaves the browser.

Load an image and click a pixel…

FORMAT:

JPEG only (PNG/WebP don't carry EXIF). Everything stays local — nothing uploaded.

Load a JPEG to inspect its metadata…

VERSION: COUNT: FORMAT: