Base64 Encode Decode Offline vs Binary Hex Number Converter

Paste a Base64 string, tap once, read the answer — right on your iPhone, fully offline. No web converter, no upload, no wondering who just logged the token you pasted. Base64 Encode Decode Offline is a developer scratchpad built for the real thing you paste: blobs copied out of logs and terminals. The decoder tolerates URL-safe alphabets, missing padding and line-wrapped copy-paste, auto-detects whether you meant encode or decode, and refuses garbage instead of returning silent nonsense. URL decoding is byte-accurate, so a leading BOM or odd byte is preserved instead of being quietly eaten. Everything renders in a proper monospaced font. WHAT YOU GET • A wrapped, unpadded, URL-safe Base64 blob from a log file still decodes cleanly — whitespace, CRLF and base64url handled for you • Paste a JWT and read its pretty-printed header and payload immediately — the signature never touches a server • One input, four digests: MD5, SHA-1, SHA-256 and SHA-512 update as you type, with one button to copy all four • URL-encode a query value and the &, =, + and # characters that break query strings are actually escaped • Turn any file into Base64 or a ready-to-embed data URI with the correct MIME type — and turn Base64 back into a file • The String Inspector shows characters, UTF-8 / UTF-16 / UTF-32 byte counts, words and lines the moment text is entered PERFECT FOR • Backend and mobile developers debugging an API payload away from the laptop • QA engineers inspecting auth tokens without pasting credentials into a website • Sysadmins decoding config blobs and verifying checksums from a phone session • Students seeing exactly how encodings and hash digests behave WHY NOT JUST USE A WEB CONVERTER? Because every online encode/decode tool receives your string on its server — and the strings developers convert are exactly the ones that should never leave the machine: session tokens, API keys, connection strings, JWTs. This app does all conversion and hashing on the device with Apple's CryptoKit. It works in airplane mode. PRIVATE BY DEFAULT No accounts, no tracking of your content, no network needed to convert. Your inputs and your conversion history are stored only on your iPhone. FULL ACCESS Pro unlocks unlimited saved conversions, file conversion beyond 5 MB in both directions, and Batch mode to convert many lines in one pass. Full access is available as a weekly subscription, a yearly subscription, or a one-time lifetime purchase. Decode that string before the next station — download Base64 Encode Decode Offline. Terms of Use: https://leanstudio.asia/terms-of-use Privacy Policy: https://leanstudio.asia/privacy-policy Support: support@leanstudio.asia

Convert any number between binary, octal, decimal, and hex — live, as you type. Every base updates at once, with exact integer math and zero float drift. Most calculators round, guess the bit width, or hide what's actually happening in the bits. This one doesn't. Type a value in any base and read all four representations side by side in clean, monospaced, grouped digits — plus signed and unsigned interpretation, set-bit counts, and the raw bytes, at 8, 16, 32, or 64-bit width. WHAT YOU GET - Every base at once: binary, octal, decimal and hex stay in sync as you type - Any radix from 2 to 36 with a live slider, so odd bases are one tap away - Bit-level truth: signed two's-complement, unsigned, set-bit count and big-endian bytes - Bitwise lab with a tappable bit grid — AND, OR, XOR, NOT and shifts, flipped bit by bit - Developer reference: full ASCII table, powers of two, common masks and a two's-complement explainer - Saved history you can scroll back through and copy any value from PERFECT FOR - Developers reading hex dumps, registers and color values - Embedded and firmware engineers working close to the metal - CS and engineering students learning number bases and bit math - Anyone who needs an exact, no-nonsense radix converter WHY NOT JUST USE A CALCULATOR? A regular calculator drops leading zeros, drifts on large values, and shows one base at a time. BaseConvert keeps exact integer math at a fixed bit width and shows binary, octal, decimal and hex together — so you see the bits, not a rounded guess. PRIVACY Everything runs on-device. No accounts, no ads, no tracking — your numbers never leave your phone. FULL ACCESS The bitwise lab, the full developer reference, and unlimited saved history unlock with Premium — available as a weekly or yearly plan, or a one-time lifetime unlock. Convert between the four core bases free, forever. Type your first value and watch every base light up. Terms of Use (EULA): https://web-levi.web.app/terms Privacy Policy: https://web-levi.web.app/privacy-policy Questions? tphuc.work@gmail.com