# PotoHEX - HEX File Editor — Inspect And Edit Any File

> iOS file editor for byte/character inspection, modification, and data manipulation. (iPhone/iPad app by Alexander Pototskiy.)

- Source: https://appshunter.io/ios/app/potohex-hex-file-editor/id1620963302 (this page in markdown: same URL + `.md`)
- Developer: [Alexander Pototskiy](https://appshunter.io/developer/1620963304)
- Category: Developer Tools, Utilities
- Price: Free with in-app purchases
- Rating: 3.50/5 from 16 App Store ratings · 21 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 20 MB
- Languages: American English
- Released: 2022-05-02
- Data updated: 2026-08-25
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/potohex-hex-file-editor/id1620963302/reviews.md

## What is PotoHEX?

The PotoHEX is an application that is used to create, explore and modify arbitrary files on your iOS device.

MAIN FEATURES:

• Byte and Character level inspecting and editing
    • Select any from UTF-7/8/16/32/BE/LE or 100+ other encodings for character-level inspecting & editing
    • Use predefined encoding groups for simplifying the search for an encoding
    • Search for the desired encoding by name
    • Quick view of selected bytes/characters directly in the encoding selection table
• Replace or Insert bytes and characters
• Inspect and modify integer types at the cursor position
• Select a byte or text region for the subsequent actions:
    • Convert text to another encoding.
    • Сalculate checksums: Adler-32, BSD checksum, CRC-8, CRC-16, CRC-32, CRC-64, CRC-8/CDMA2000, CRC-8/DARC, CRC-8/DVB-S2, CRC-8/EBU, CRC-8/I-CODE, CRC-8/ITU, CRC-8/MAXIM, CRC-8/ROHC, CRC-8/WCDMA, CRC-16/CCITT_FALSE, CRC-16/AUG_CCITT, CRC-16/BUYPASS, CRC-16/CDMA2000, CRC-16/DDS-110, CRC-16/DECT-R, CRC-16/DECT-X, CRC-16/DNP, CRC-16/EN-13757, CRC-16/GENIBUS, CRC-16/MAXIM, CRC-16/MCRF4XX, CRC-16/RIELLO, CRC-16/T10-DIF, CRC-16/TELEDISK, CRC-16/TMS37157, CRC-16/USB, CRC-A, CRC-16/KERMIT, CRC-16/MODBUS, CRC-16/X-25, CRC-16/XMODEM, CRC-32/BZIP2, CRC-32C, CRC-32D, CRC-32/MPEG-2, CRC-32/POSIX, CRC-32Q, CRC-32/JAMCRC, CRC-32/XFER, CRC-64/WE, and CRC-64/XZ.
    • Сalculate hashes: BLAKE/BLAKE2, MD2, MD4, MD5, MD6, SHA1, SHA2 (SHA-224, SHA-256, SHA-384, SHA-512, SHA-512/256, SHA-512/224), SHA3-224, SHA3-256, SHA3-384, SHA3-512, SHAKE128, SHAKE256, RIPEMD-128/160/256/320, Tiger/Tiger2, Whirlpool and STREEBOG (Стрибог, ГОСТ 34.11-2018)
    • Encode or Decode from or to Base16, Base32(RFC 4648, hex, Crockford's, and z-base-32 alphabets), Base58(BITCOIN, RIPPLE, FLICKR, and GMP alphabets), Base64, Ascii85, and Z85(ZeroMQ) encodings
    • Encrypt or Decrypt using AES 128/192/256, BLOWFISH, DES, 3DES, RC2, and RC4 algorithms
    • Compress or Extract by Deflate/Inflate, BZIP2, and LZMA/LZMA2 algorithms.
    • Export the selected region as a QR code.
    • Fill the region with a given multibyte pattern
    • Cut the region
    • Copy and Paste the region
• Undo/Redo
• Clone or delete files

INTERFACE
• Multi-tab interface
• Tabs can be reordered or removed by long pressing on them and dragging
• Change the width of an arbitrary column in the file data table
• Jump to arbitrary file offset by tapping on the Offset column
• Choose from Decimal or Hexadecimal formats for the file offset values by tapping on the Offset column header
• The space occupied by the file data table and the property sheet (or their relative arrangement) can be tuned by dragging (or double-tapping) the delimiter handle between them
• Zoom in/out almost every part of the user interface
• Light and Dark themes depending on the device settings

AUXILIARY
• File renaming
• Change the size of the file
• Select the number of bytes in a row 
• Find & replace an arbitrary text or byte fragment with an arbitrary text or byte fragment
• Access the App's Document folder through a Web Browser

LIMITATIONS
• Undo/Redo works for modifications up to 16Mb

This app by default has restrictions on file content visibility. The visible content of any file is restricted by the first 256 bytes. To remove those restrictions you can start a monthly auto-renewable subscription or buy permanent full access.

Privacy Policy: https://apotocki.github.io/potohex/privacy.pdf
Terms of Use: https://apotocki.github.io/potohex/terms-of-use.pdf

## Key features

- Byte and character level inspection/editing
- Extensive encoding support
- Checksum and hash calculations
- Encryption and decryption
- Compression and decompression
- Multi-tab interface
- Undo/Redo functionality

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Monthly | $0.99 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Permanent | $9.99 | one-time |


## Recent user reviews (10 of 21)

All indexed reviews: https://appshunter.io/ios/app/potohex-hex-file-editor/id1620963302/reviews.md

### 1/5 — 打开二进制文件全是xxxxxx

*2026-03-25*

只会显示xxxxx

**Developer response:** 感谢您的反馈。
显示“xxxxxx”并不是错误，而是免费演示模式中超过256字节限制的内容。这个限制在应用中已有说明。
升级后可以查看完整内容。

### 1/5 — Unusable

*2026-03-25, version 1.13*

This time-waster just nags you to send money without ever demonstrating that it would be any use.

### 5/5 — Great

*2026-03-12*

Works well. Know that you can scroll vertically and horizontally in address, data, and ASCII fields. You can also resize the columns and you can also pinch and zoom to make things more readable. Powerful hex editor.

**Developer response:** Thank you for the great review!
We’re really happy to hear you’re making use of features like scrolling, column resizing, and pinch-to-zoom — making complex data easier to explore is exactly what we aim for.
Thanks for your support!

### 1/5 — Star is 0

*2026-01-14*

Hidden 0x0100~

### 1/5 — You have to pay a subscription to edit a whole file

*2025-06-25*

Yes you do

**Developer response:** Thank you for your feedback.
The app offers a free demo mode so users can explore its functionality before making any purchase. Full file editing is part of the paid version, which helps support ongoing development.
Unlike many alternatives, the app focuses on providing a powerful and user-friendly hex editing experience, including advanced navigation, large file handling, and precise data control.

### 1/5 — Templates?

*2025-04-25*

Sadly, I can't evaluate if this program is capable of handling e.g. template oriented tasks, etc. for my application or if operation/handling is sufficiently easy ... 256 Bytes are not enough, sorry.

I don't see any reference to subscriptions or fees in the App-Store either.

I'd suggest implementing a trial period, e.g. a few hrs and max. e.g. 5 separate files.

As I frequently use large files over time _not_ needing to lug Laptops around with me all the time would really be nice.

I fervently disagree with the subscription model. Call me old-school (which I am).

Therefore, a lifetime or version limited license would really make me happy. E.g. this and the next version perpetually for a fixed amount.

If it's really that good, you'll certainly find enough willing to shell (reasonable) money...

**Developer response:** A lifetime licence is available as well as a monthly subscription.

### 5/5 — Perfect

*2025-02-17*

This is by far the best hex-editor on the store. I don't understand those negative reviews because of the limited test version. This app has a small subscription fee (I personally don't like subscriptions but here it makes sense) and a fair one-time payment fee. Also this app does not spy on you. Paying 10 bucks for such a well done app shows respect to the hard work and supports a rare fair developer. Thanks Sir.

### 5/5 — Great and useful tool

*2024-12-27*

Look at the possibilities in this app, it is amazing. One time buy possible, this is very good. Thank you!

### 2/5 — useful kinda

*2024-11-18, version 1.13*

only shows the first 250 bytes without purchase but good for pretending i know what im doing when i don’t so 2 star

### 2/5 — great, but I hate how you can only view 256 bytes if you didn’t pay

*2024-11-12*

:(

## Frequently asked questions about PotoHEX

### What is PotoHEX used for?

PotoHEX is an application designed to create, explore, and modify arbitrary files directly on your iOS device. It offers byte and character level inspection and editing capabilities.

### Does PotoHEX support different encodings?

Yes, PotoHEX supports byte and character level inspecting and editing with selections from UTF-7/8/16/32/BE/LE and over 100 other encodings. It also provides predefined encoding groups and search functionality.

### What kind of data manipulation can I perform with PotoHEX?

You can replace or insert bytes and characters, inspect and modify integer types, convert text between encodings, calculate numerous checksums and hashes, and encode/decode using various formats like Base16, Base64, and Ascii85.

### Can PotoHEX encrypt or compress files?

Yes, PotoHEX supports encryption and decryption using algorithms like AES, BLOWFISH, and DES. It also offers compression and extraction via Deflate/Inflate, BZIP2, and LZMA/LZMA2.

### How does PotoHEX handle file operations?

PotoHEX allows you to clone or delete files, rename them, and change their size. You can also select the number of bytes displayed per row and find/replace text or byte fragments.

### What is the user interface like in PotoHEX?

The interface features a multi-tab system that can be reordered or removed. You can adjust column widths, jump to specific file offsets, choose between decimal or hexadecimal formats for offsets, and zoom in/out on most UI elements. It also supports light and dark themes.

### Is PotoHEX free to use?

PotoHEX is available for free, but it does offer in-app purchases. There is also a monthly subscription plan available for $0.99.

### What devices is PotoHEX compatible with?

PotoHEX is compatible with iPhone, iPad, and iPod devices. It has an age rating of 4+.

## Version history (last 5 releases)

### 1.13 — 2023-04-25

• RC5 and RC6 cipher algorithms
• BLAKE and BLAKE2 hash algorithms
• LZMA and LZMA2 compress/extract algorithms
• some UI & UX improvements in the File Uploader WEB interface
• introduced the ability to specify byte vectors in the form of text in a given file encoding (e.g. for IV or key byte vectors)
• find & replace an arbitrary text or byte fragment with an arbitrary text or byte fragment

### 1.12 — 2023-03-06

• added Web Browser access to the App's Document folder
• added BSD checksum algorithm.
• added Whirlpool hash algorithm.
• added RC2 cipher algorithm

### 1.11 — 2022-10-24

• added z-base-32 alphabet for Base32 Encoder/Decoder algorithm.
• stability fixes

### 1.10 — 2022-10-16

• Added RIPEMD-128, RIPEMD-160, RIPEMD-256, RIPEMD-320, Tiger/Tiger2, and STREEBOG (Стрибог, ГОСТ 34.11-2018) hash algorithms.
• Added BLOWFISH cipher algorithm.
• Added Adler-32 checksum algorithm.
• Added Crockford's Base32 and Base58(BITCOIN, RIPPLE, FLICKR, and GMP alphabets) encode and decode algorithms.
• Added Compression and Extraction algorithms: Deflate/Inflate, BZIP2.
• Added searching algorithms by name.

### 1.9 — 2022-09-06

• Added text encoding converter. 
• Added Ascii85 and Z85 (ZeroMQ) encode/decode algorithms.
• Added context menu for the active tab.
• Added the button that opens all open tabs as a list.
• Fixed the bug where the PCBC cipher mode doesn't work.
• Fixed the bug where a cloned file isn't opened automatically.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-25.*