Encode or decode text using Base64, Base64URL, URL encoding, HTML entities, Hex, Binary, ROT13, UTF-8, and Unicode escape schemes. Code never leaves your device — formatting and validation run locally in your browser.
Content reviewed October 2026 · About Toolzum
Encode or decode URLs with percent-encoding. Swaps input/output for quick bidirectional conversion. Code never leaves your device — formatting and validation run locally in your browser.
Encode special HTML characters into entities (& < >) or decode them back to readable text — display code safely and neutralize injection vectors.
Encodes text or small files into Base64 strings and decodes them back with automatic MIME-type detection for binary safety. Code never leaves your device — formatting and validation run locally in your browser.
Encode images to Base64 data URIs for CSS embedding and API payloads. Inline a logo without extra requests — local encoding, free, no signup.
Encode any text into binary (base-2) byte sequences with visible separators. See exactly how computers store letters — local encoding, free, no signup.
Base64, URL, HTML entities, and hex — the common web pairings.
Both directions — paste encoded text back to readable form any time.
Text-oriented encodings; binary blobs belong in dedicated hex tools.
No — conversion runs locally in your browser, free with no signup.
Random Port Generator
Generate random TCP/UDP port numbers from well-known, registered, or dynamic ranges. Useful for network testing, Docker port mapping, and firewall configuration.
Chmod Calculator
Convert between numeric (755) and symbolic (u=rwx,g=rx,o=rx) chmod permission formats. See detailed breakdown for owner, group, and others.
Docker Run to Compose Converter
Convert docker run commands to docker-compose.yml format. Supports ports, volumes, environment variables, networks, restart policies, and container names.
Email Normalizer
Normalize email addresses by removing dots (Gmail), stripping +tags, and lowercasing. Process multiple emails at once for deduplication and cleaning.
Diff Checker
Compares two input texts side-by-side, highlighting inserted, deleted, and changed lines with distinct background colors. Code never leaves your device — formatting and validation run locally in your browser.
IP Address Lookup
Displays your public IPv4 and IPv6 addresses with geolocation data (city, ISP, ASN, timezone). Network engineers use it to verify VPN connectivity. Uses cloud-based processing.