Writing · Browser
Word Counter
Count words, characters, sentences, paragraphs and estimated reading time without sending your text anywhere.
Private browser tools · local-first writing help
Practical text, developer and writing tools with clear processing boundaries.
Use 40 client-side utilities for text, email, data, encoding and developer work, plus 19 assisted writing and SEO tools that always produce a deterministic local server result before optional AI.
40 browser tools19 local-first assisted toolsOptional AI fallbackProcessing explained
Start with a real task
Popular tools
Writing · Browser
Character Counter
Measure characters with spaces, characters without spaces and UTF-8 byte length locally.
Writing · Browser
Reading Time Estimator
Estimate reading time using a configurable words-per-minute rate.
Cleanup · Browser
Remove Extra Spaces
Collapse repeated spaces, trim lines and remove unnecessary blank lines in one local pass.
Cleanup · Browser
Remove Duplicate Lines
Deduplicate lines while preserving their first occurrence, with case-sensitive and blank-line controls.
Writing · Browser
Case Converter
Convert text to uppercase, lowercase, title case, sentence case, alternating case or toggled case.
SEO · Browser
Slug Generator
Create clean lowercase URL slugs with transliteration, stop-word removal and custom separators.
Cleanup · Browser
Smart Quote Converter
Straighten or curl quotes and normalize common dashes without sending text to a server.
SEO · Browser
Keyword Density and Extractor
Find frequent terms, two-word phrases and approximate density while filtering common stop words.
Cleanup · Browser
Bulk Find and Replace
Replace plain text or regular-expression matches with case-sensitive and global controls.
File Readers · Browser
EML Email Reader
Open an .eml file locally to inspect sender, recipients, dates, subject, message text, authentication headers and attachment names.
Cleanup · Browser
Text Difference Checker
Compare two text blocks line by line and highlight additions, removals and changed lines locally.
Browser processing
Keep deterministic work on the device.
Counters, formatters, converters, EML inspection, hashes, regex checks and diagram work run locally where supported. The page does not silently upload those inputs.
Assisted processing
Receive a useful local result first.
Grammar, rewriting, business drafts and SEO helpers use a deterministic PHP engine. Optional AI is clearly labelled, independently configured and never required for a result.
Editorial guidance
Understand formats and limitations.
Reviewed guides explain what a decoder, converter or generator can establish, what still needs verification and how to protect sensitive source material.
A transparent workflow
Choose the smallest processing method that solves the task.
Use a browser tool when the transformation can be completed deterministically on the device. Use a local-first assisted tool when the task needs structured drafting but can still produce a useful result without a language model. Optional AI is appropriate only when the owner has configured a trusted endpoint and the visitor deliberately selects enhancement.
TXTNimble does not describe Base64 as encryption, JWT decoding as signature verification, generated policy text as legal advice, similarity scores as plagiarism proof or structured-data output as a guarantee of rich results. Those distinctions are part of the product rather than hidden in a disclaimer.
Read the data-handling modelReviewed guidance
Latest practical guides
Email & Files
How to Read an EML File Safely Without Outlook
Understand what an EML file contains, inspect headers and attachments locally, and avoid executing active or untrusted content while reviewing an email backup.
Security
JWT Decoding Is Not Signature Verification: A Practical Guide
Learn what a JWT decoder can reveal, what it cannot prove, and how expiry, audience and signature checks should be separated during authentication debugging.
Encoding
Base64 Encoding Is Not Encryption: Standard and URL-Safe Forms
Understand standard Base64, Base64URL, padding, Unicode handling and why encoded data must never be treated as encrypted or confidential.
Security
SHA-256 vs MD5 for File Integrity Checks
Compare common checksum algorithms, generate hashes locally, and understand why matching checksums detect accidental changes but do not automatically prove trust.
Use the tools your way
Start free, without creating an account.
Every browser tool is available for ordinary use without signing in. Open a workspace, review its privacy note and process the text or file on your device. Accounts are useful only when you want member-level limits for the local-first writing and SEO tools.
Paid access appears only when secure checkout is genuinely available. No tool result should be accepted blindly: compare important values, keep the original input and use the destination system’s validator whenever the output will affect production, security, legal or compliance work.