markenfokp
MASTER TECH GROUP PTY LTD Tools
JSON, hex, hashes, regex, cron, CIDR and diff. Offline, zero permissions.
- Downloads
- 6+
- on Google Play
- Price
- Free
- No in-app purchases
- Updated
- Oct 26
- 2026 · v1.1
Screenshots
About markenfokp
markenfokp is eleven developer tools with no network code in them.
Not "no network permission" — no code. There is no socket, no HTTP client, and no embedded browser engine in the binary, which is why you can paste a production payload into it without thinking twice. Nothing uploads, because nothing can.
1. JSON Format & Validation
Paste JSON and, if it is invalid, markenfokp reports the exact line, column, and unexpected token with a caret pointer directly beneath the offending character. Documents that fail parsing are never rewritten, reformatted, or minified. When valid, you receive structured statistics: total keys, nesting depth, minified byte size, and formatted compression ratio.
2. Hex & Codepoint Inspector
Every byte is classified and coloured by type: printable ASCII, control codes, or high bytes of multi-byte UTF-8 sequences. Tap any byte cell to inspect its offset, hex, decimal, and binary representation. markenfokp resolves the full Unicode codepoint name (such as U+2014 EM DASH) and Unicode general category using the platform ICU engine without bundling third-party tables.
3. Standalone Cryptographic Hashes & Checksums
Generate MD5, SHA-1, SHA-256, SHA-384, SHA-512, SHA3-256, and CRC32 checksums. Includes a self-contained RFC 7693 BLAKE2b implementation. Compare digests against expected values with instant match validation and clear legacy security warnings. All digests compute in streaming chunks to keep memory usage minimal.
4. Text & Unified Patch Diff
Compute unified differences between two text blocks using the Myers O(ND) algorithm with a dedicated 22dp recessed gutter. Changed lines feature a second word-level Myers pass to pinpoint localized modifications, such as updated port numbers or changed variables.
5. CIDR & Subnet Arithmetic
Pure 32-bit subnet arithmetic without DNS lookups. Computes network address, broadcast address, netmask, wildcard mask, usable host ranges, and bit-by-bit binary mask visualization. Easily split address spaces into equal subnets (such as a /20 into four /22 blocks).
6. Regex Tester with Backtracking Protection
Test regular expressions with real-time match highlighting, named capture groups, and individual token breakdowns. Matches execute on a dedicated worker with a strict two-second execution budget against an interruptible sequence wrapper, protecting the interface against catastrophic backtracking.
7. Cron Expression Parser & Schedule
Parse standard 5-field cron expressions into individual component trees (minute, hour, day-of-month, month, day-of-week). Generates a natural language schedule summary and projects the next six run times in your local time zone.
8. Encodings: Base64, URL & HTML
Convert text simultaneously across Standard Base64, URL-Safe Base64, Hexadecimal, Binary, URL Percent-Encoding (RFC 3986), and HTML5 entities. Bidirectional decoding with instant error detection.
9. UUID & Identifier Generator
Generate UUID v4 (random), UUID v5 (SHA-1 namespace), UUID v7 (Unix timestamp millisecond precision), ULID (Crockford Base32), and NanoID strings with full structural bit decomposition.
10. Epoch & Multi-Zone Time Converter
Convert Unix timestamps across seconds and milliseconds to ISO-8601, RFC 2822, and human-readable formats. Inspect timestamps simultaneously across five global time zones using the device timezone database.
11. Colour Science & WCAG 2.2 Contrast
Convert colours across HEX, sRGB, HSL, and OKLCH. Calculates exact relative luminance from linear channel values to evaluate WCAG 2.2 contrast ratios on white and black surfaces, alongside an 11-step tint and shade scale.
Zero Android permissions. No accounts, no telemetry, no analytics, and no advertising. Saved snippets remain strictly on your device and export through the system file picker upon your request.
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Not "no network permission" — no code. There is no socket, no HTTP client, and no embedded browser engine in the binary, which is why you can paste a production payload into it without thinking twice. Nothing uploads, because nothing can.
1. JSON Format & Validation
Paste JSON and, if it is invalid, markenfokp reports the exact line, column, and unexpected token with a caret pointer directly beneath the offending character. Documents that fail parsing are never rewritten, reformatted, or minified. When valid, you receive structured statistics: total keys, nesting depth, minified byte size, and formatted compression ratio.
2. Hex & Codepoint Inspector
Every byte is classified and coloured by type: printable ASCII, control codes, or high bytes of multi-byte UTF-8 sequences. Tap any byte cell to inspect its offset, hex, decimal, and binary representation. markenfokp resolves the full Unicode codepoint name (such as U+2014 EM DASH) and Unicode general category using the platform ICU engine without bundling third-party tables.
3. Standalone Cryptographic Hashes & Checksums
Generate MD5, SHA-1, SHA-256, SHA-384, SHA-512, SHA3-256, and CRC32 checksums. Includes a self-contained RFC 7693 BLAKE2b implementation. Compare digests against expected values with instant match validation and clear legacy security warnings. All digests compute in streaming chunks to keep memory usage minimal.
4. Text & Unified Patch Diff
Compute unified differences between two text blocks using the Myers O(ND) algorithm with a dedicated 22dp recessed gutter. Changed lines feature a second word-level Myers pass to pinpoint localized modifications, such as updated port numbers or changed variables.
5. CIDR & Subnet Arithmetic
Pure 32-bit subnet arithmetic without DNS lookups. Computes network address, broadcast address, netmask, wildcard mask, usable host ranges, and bit-by-bit binary mask visualization. Easily split address spaces into equal subnets (such as a /20 into four /22 blocks).
6. Regex Tester with Backtracking Protection
Test regular expressions with real-time match highlighting, named capture groups, and individual token breakdowns. Matches execute on a dedicated worker with a strict two-second execution budget against an interruptible sequence wrapper, protecting the interface against catastrophic backtracking.
7. Cron Expression Parser & Schedule
Parse standard 5-field cron expressions into individual component trees (minute, hour, day-of-month, month, day-of-week). Generates a natural language schedule summary and projects the next six run times in your local time zone.
8. Encodings: Base64, URL & HTML
Convert text simultaneously across Standard Base64, URL-Safe Base64, Hexadecimal, Binary, URL Percent-Encoding (RFC 3986), and HTML5 entities. Bidirectional decoding with instant error detection.
9. UUID & Identifier Generator
Generate UUID v4 (random), UUID v5 (SHA-1 namespace), UUID v7 (Unix timestamp millisecond precision), ULID (Crockford Base32), and NanoID strings with full structural bit decomposition.
10. Epoch & Multi-Zone Time Converter
Convert Unix timestamps across seconds and milliseconds to ISO-8601, RFC 2822, and human-readable formats. Inspect timestamps simultaneously across five global time zones using the device timezone database.
11. Colour Science & WCAG 2.2 Contrast
Convert colours across HEX, sRGB, HSL, and OKLCH. Calculates exact relative luminance from linear channel values to evaluate WCAG 2.2 contrast ratios on white and black surfaces, alongside an 11-step tint and shade scale.
Zero Android permissions. No accounts, no telemetry, no analytics, and no advertising. Saved snippets remain strictly on your device and export through the system file picker upon your request.
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