Text Encryptor/Decryptor Online — Free & Private
Encrypt or decrypt text with a password, using AES-GCM. Free, private, and processed entirely in your browser — no upload, no account, no file ever leaves your device.
How to use Text Encryptor/Decryptor
Encrypt or decrypt text with a password, using AES-GCM. Everything runs in this tab — nothing is uploaded for the core job.
- Enter your content — Type or paste what you want to work with — Text Encryptor/Decryptor runs immediately in your browser.
- Choose your options — Set any options Text Encryptor/Decryptor offers.
- Get your result — Copy or download the result \u{2014} done entirely on your device, nothing uploaded.
Privacy proof for Text Encryptor/Decryptor
This tool processes files in your browser. Open DevTools → Network while you run it: your document is not uploaded. After one online visit, many tools keep working with Airplane Mode on (libraries cached locally).
Popular tools
The highest-demand tools with full options — browse by category below for the rest.
Star any tool — it appears under Favorites on this device.
How this actually works
Each tool runs entirely with JavaScript already loaded in this page — PDF tools via pdf-lib and pdf.js, image tools via the browser's native Canvas API, and everything else with plain JavaScript. Your files or input are read into browser memory, processed, and handed back as a download or copyable result. This page itself is served by a small Laravel route; Laravel never sees your files either. The only backend in use is Supabase, and only for two optional things: signing in with a magic link, and — only if you're signed in — a log of which tool you ran and when. Honest limits worth knowing: Compress PDF flattens each page to a re-encoded image (great for scans, not ideal if you need selectable text after); HEIC conversion uses a small on-demand converter when the browser cannot decode HEIC natively (Safari often works without it); Fill PDF Form is best-effort for simple AcroForm fields, not a full Adobe Forms replacement; and Word/Excel/PowerPoint ⇄ PDF genuinely needs a server-side engine, so it isn't included — this build only ships tools that can honestly run client-side.
Questions people actually ask
What encryption does this use?
AES-GCM (256-bit), a modern, authenticated encryption standard, via the browser's own built-in Web Crypto API — not a custom or hand-rolled cipher.
How is the key derived from my password?
PBKDF2 with a random salt and a high iteration count, the standard way to turn a human password into a cryptographic key resistant to brute-forcing — the same category of approach real password managers use.
What if I forget the password I encrypted with?
There's no recovery — the encrypted text can only be decrypted with the exact same password. If it's lost, the encrypted text is permanently unreadable, by design.
Can I decrypt text encrypted somewhere else?
Only if it was encrypted with the exact same method (AES-GCM, PBKDF2 key derivation, same salt/IV encoding format) — this isn't a general-purpose decryptor for arbitrary encrypted data or other tools' output.
Is the encrypted output safe to share, e.g. by email?
The encrypted text itself is safe to share as ciphertext — but never share the password through the same channel, or the encryption provides no real protection.
Is my password or text sent anywhere?
No — encryption and decryption happen entirely in your browser using the Web Crypto API; neither your password nor your text is ever transmitted.
Why use this instead of a real encrypted messaging app?
For quick, occasional needs — encrypting a note before pasting it somewhere, or a password before sharing it through an otherwise-insecure channel. For ongoing secure communication, a dedicated encrypted messaging app is the better tool.
What output format does the encrypted text use?
A single Base64-encoded block containing the salt, initialization vector, and ciphertext together — paste that whole block back in to decrypt, along with the same password.
Is this really free, and is there a file size limit?
Yes — no account, no paywall. Since processing happens in your browser's memory rather than uploading anywhere, the practical limit is your device's available RAM, not a server quota. Very large files (500+ pages) may run slower, especially for Compress and PDF→JPG.
Does anything about my file get sent anywhere?
No. Every tool runs with pdf-lib/pdf.js loaded in this page; your file is read into browser memory and never leaves it. The only network call this app makes for your account is Supabase auth — and that only stores which tool you ran and when, never file content.
Why isn't Word/Excel/PowerPoint → PDF included?
Converting Office formats accurately needs a real rendering engine (what Word or LibreOffice use internally) — no browser library does this reliably. Rather than ship a broken version, it's left out.
Does TechDriven Tools have OCR (text recognition)?
Yes — OCR PDF recognizes text in scanned or photographed pages using Tesseract.js, running entirely on your device, and gives you a searchable PDF or a plain text file. Nothing is uploaded for this either.
Can I use this without an internet connection?
Once the page and its libraries have loaded once, yes — the tools themselves need no network access. Signing in and viewing history do require a connection, since those talk to Supabase.
What happens to the "history" if I sign in?
Only a row per tool run — the tool's name and a timestamp. No filename, no file content, ever. You can see the full list any time via the History button.
Are the non-PDF utilities (password generator, JSON formatter, etc.) private too?
Yes — same rule as the PDF tools. Word Counter, Case Converter, Password Generator, UUID Generator, Base64, Hash Generator, JSON Formatter and JWT Decoder all run with plain JavaScript already loaded in this page; nothing you type or paste is sent anywhere.
Text Encryptor/Decryptor, in depth
Encrypt or decrypt text with a password, using AES-GCM — real, standards-based encryption via the Web Crypto API.
Features
AES-GCM Encryption
A modern, authenticated encryption standard.
PBKDF2 Key Derivation
Your password is strengthened before it's used as a key.
Encrypt & Decrypt
Both directions in one tool.
Instant
No network call — encryption happens locally.
Why use Text Encryptor/Decryptor
- Share a sensitive note with someone who has the password, over an otherwise insecure channel.
- Encrypt a piece of text before storing it somewhere you don't fully trust.
- Learn how real encryption works by using genuine, standards-based cryptography.
- Decrypt text encrypted with this same tool elsewhere.
How it works
Your password is run through PBKDF2, a key-derivation function that makes brute-forcing the password itself computationally expensive, and the resulting key encrypts your text using AES-GCM — an authenticated encryption mode that also detects tampering, not just a simple cipher. All of this runs through the Web Crypto API, a real, standards-based implementation built into the browser.
Base64 vs. real encryption
This is genuine encryption, not to be confused with Base64 encoding, which is a reversible format conversion anyone can undo with no password required. Only someone with the correct password can decrypt text encrypted here.
Why people search for Text Encryptor/Decryptor
Encrypt or decrypt text with a password, using AES-GCM. Bookmark /text-encryptor-decryptor if Text Encryptor/Decryptor is part of your weekly workflow; the URL is stable and the tool stays free.
Text Encryptor/Decryptor sits in our Security Tools group. The page is built so you can finish the job without creating an account, installing a desktop pack, or sending the payload to an unknown converter API.
Who Text Encryptor/Decryptor is for
- A desktop suite is overkill for a one-page or one-photo job.
- You want a second opinion after another converter produced a weird output.
- You need a result now and do not want another account wall.
- The file or text is sensitive enough that uploading feels wrong.
Recommended workflow
Generate or check locally → store results in a password manager — not in chat screenshots.
- Open Text Encryptor/Decryptor (also available from category hubs and ⌘K).
- Use the labeled fields or dropzone — options match what Text Encryptor/Decryptor actually does.
- Run the tool and wait for local progress to finish.
- Download or copy the result, then verify on the device where you will share it.
Tips that improve results
- Change one setting at a time when you are comparing quality or layout.
- Keep the original until stakeholders accept the download.
- Rename the output with date + purpose before you attach it to email.
- On phones, plug in power for large PDFs, videos, or spreadsheets.
- Prefer UTF-8 text for developer converters; weird encodings cause most “broken” results.
- Start with a non-sensitive sample so you learn the options before the real file.
Common mistakes with Text Encryptor/Decryptor
- Expecting Text Encryptor/Decryptor to replace a full desktop suite for every edge-case format.
- Skipping a sample check and discovering a bad export after the original was deleted.
- Chaining many lossy image/PDF steps when one careful pass would have been enough.
- Using a public computer without clearing downloads afterward.
Privacy model
Processing for Text Encryptor/Decryptor is designed to stay in the browser. Laravel serves the page; it does not receive your file bytes for conversion. Optional Supabase auth only stores which tool you ran and when — never filenames or contents.
Related tools
- Password Strength Checker
- File Checksum Verifier
- TOTP / 2FA Code Generator
- JWT Verifier
- File Encryptor
- Password Breach Checker
FAQ — Text Encryptor/Decryptor
Is Text Encryptor/Decryptor free to use?
Yes. Text Encryptor/Decryptor on TechDriven Tools is free — no account, no watermark, and no paywall for the core workflow.
Does Text Encryptor/Decryptor upload my file or text?
No for processing. Text Encryptor/Decryptor runs in your browser tab. Optional sign-in never stores file contents — only tool names and timestamps if you enable history.
When should I use Text Encryptor/Decryptor?
Use Text Encryptor/Decryptor for Security Tools jobs where privacy and speed matter: quick one-offs, sensitive inputs, or checking another app’s result without another upload site.
Will Text Encryptor/Decryptor work on my phone?
Yes in a modern mobile browser. Large inputs can take longer because your device does the work locally.
What are the limits of Text Encryptor/Decryptor?
There is no server quota from us. Limits are your device memory, battery, and formats the browser can decode. Text Encryptor/Decryptor will not pretend to support server-only Office or cloud-AI pipelines.
How is Text Encryptor/Decryptor different from upload-based sites?
Upload converters send your content to someone else’s server. Text Encryptor/Decryptor keeps the transform on-device whenever the format allows, which is the safer default for confidential documents, photos, tokens, and configs.
Bottom line
If you need Text Encryptor/Decryptor done quickly and privately, start at /text-encryptor-decryptor, run it once on a sample, then process the real input. That is how TechDriven Tools stays competitive: honest capabilities, labeled UI, and content that matches what the tool actually ships.
From our blog: How to Encrypt and Decrypt Text With a Password