Image ∞ Base64 vs Base64 Encode Decode

Easily convert between any image & Base64 string

Encode and decode Base64 right on your iPhone — paste text or encoded data and watch it flip both ways in real time, with a live byte count on every result. Base64Tool is a full developer codec workbench, not a single-trick converter. Beyond standard Base64 it handles the encodings you actually hit while shipping — URL-safe Base64, percent-encoding, HTML entities, Hex, and Base32 — plus a JWT inspector and an image-to-data-URI converter, all running entirely on-device with nothing sent to a server. WHAT YOU GET - Instant two-way Base64 encode and decode with a live byte and size readout - A whole codec set: Base64URL, URL percent-encoding, HTML entities, Hex, and Base32 - A JWT decoder that splits any token, pretty-prints the header and payload, and surfaces claims and expiry - An image converter that turns any photo into a Base64 data-URI for HTML, CSS, or JSON — and pastes one back to preview - Saved history so you can pull up a past conversion without retyping it - A built-in reference that explains Base64, data-URIs, and JWTs in plain language PERFECT FOR - Web and API developers wiring up tokens, payloads, and query strings - Mobile and backend engineers debugging encoded data on the go - DevOps and security folks inspecting JWTs and Base32 secrets - Students learning how encodings actually work under the hood WHY NOT JUST USE A WEBSITE? Online encoders make you paste sensitive tokens and payloads into someone else's server. Base64Tool does every conversion locally on your device — no upload, no account, no waiting on a network — so a private key or auth token never leaves your phone. PRIVACY Everything runs on-device. No accounts, no servers, no tracking, and your saved history stays inside the app. Your payloads never leave your iPhone. FULL ACCESS Standard Base64 encode and decode is free forever. Unlock everything else — the Base64URL, URL, HTML, Hex and Base32 codecs, the JWT decoder, and the image data-URI converter — with Base64Tool Pro: - Weekly plan - Yearly plan - Lifetime (one-time purchase) Payment is charged to your Apple ID at confirmation. Subscriptions renew automatically unless canceled at least 24 hours before the current period ends; manage or cancel anytime in your App Store account settings. Paste your first string and watch it decode instantly. Terms of Use (EULA): https://web-levi.web.app/terms Privacy Policy: https://web-levi.web.app/privacy-policy Questions? Support: tphuc.work@gmail.com