A short guide for every tool on the site. No newsletter, no account — read it, then open the tool.
Check word count, characters, sentences, and reading time as you type. Built for essays, assignments, and drafts that have a limit.
Track characters and words against real limits for LinkedIn, Instagram, SMS, and search snippets.
Convert text to lowercase, UPPERCASE, Title Case, Sentence case, or Capitalize Each Word without retyping.
Deduplicate lines, trim whitespace, drop blanks, and sort so a list is safe to use.
Draft in the browser with auto-save on this device. Copy, download a .txt file, or clear when you are done.
Record your screen, window, or tab with optional microphone and webcam, then download the file or share it for 24 hours.
Put names or options on a wheel, spin, and optionally remove the winner so the next round is still fair.
Calculate age in years, months, and days from a date of birth, plus the next birthday.
Find a percent of a number, reverse a percentage, and measure increase, decrease, or difference.
Work out sale prices from a discount, an extra discount, and optional sales tax.
Calculate how much to set aside daily, weekly, or monthly to reach a savings goal on time.
Estimate Zakat on eligible assets using commonly used calculation principles, including gold, silver, and business wealth.
Calculate profit, margin, markup, and selling price for a product or a service.
Measure years, months, days, weeks, and weekdays between two dates, including business-day style counts.
Convert length, weight, temperature, area, volume, speed, data, and time with a single converter.
Convert bytes, KB, MB, GB, and TB using decimal (1000) or binary (1024) units.
Share one file up to 16 GB with a link that expires after 24 hours, then the file is deleted.
Find emails, keys, and other sensitive pieces in an AI prompt and build a safer version to paste elsewhere.
Find personal or sensitive information in text and mask it so you can share a safer copy.
Inspect photo metadata and remove private EXIF such as location before you share the image.
Blur, pixelate, or cover sensitive regions in a screenshot so the downloaded PNG is actually redacted.
Inspect a document for revealing metadata and download a cleaner copy when you can.
Inspect media for Content Credentials and provenance information when the file includes them.
Analyze Content Credentials, metadata, and a local detector signal to better understand how an image may have been created.
Check messages and links for common scam, phishing, and impersonation warning signs.
Share encrypted text with a link that expires or burns after reading. The key stays in the link fragment.
Compress JPG, PNG, and WebP in your browser and compare original size with the result before you download.
Resize by width, height, or percent, with presets for Instagram, YouTube, Facebook, and LinkedIn.
Crop with zoom and rotate, using 1:1, 4:3, 16:9, or 9:16, then download the pixels you chose.
Convert a JPEG photo to PNG in your browser without an account.
Convert PNG to JPG in your browser with JPEG quality control and a background colour for transparent areas.
Convert WebP to JPG or PNG, and JPG or PNG to WebP, in the browser.
Make a captioned video from a script in your browser. Generate local Auto Voice, upload your own narration, or export images and captions only.
Convert text and documents into natural speech in your browser. Preview multiple voices, then download a WAV file.
Generate a random password with length, letters, numbers, and symbols you control.
Rate a password as Weak, Fair, Good, or Strong from length, variety, and common patterns.
Generate random integers in a range, with or without duplicates, for draws, tests, and classrooms.
Choose one or more names from a list for classrooms, giveaways, and meetings.
Create QR codes for URL, text, email, phone, SMS, or Wi-Fi and download PNG or SVG.
Pretty-print, minify, validate, repair, search, and inspect JSON in your browser with a tree, paths, and a cautious fixer.
Generate types from a JSON sample in your browser: classes, interfaces, structs, and dataclasses with original keys preserved.
Convert text or data to Base64 and back in the page, without sending it to a third-party API.
Create RFC-style GUIDs for local development, test data, and identifiers that should not collide.
Merge PDFs in the browser, reorder or remove pages, and download a single file.
Split a PDF with ranges such as 1-3,7,9-12 and download a new file with only those pages.
Place JPEG photos on Auto, A4, or Letter pages with margins and orientation, then download a PDF.
Render PDF pages to JPEG and download one page or all pages as a ZIP.
Add text, images, signatures, drawings, highlights, and page changes to a PDF in your browser, then download or share for 24 hours.
Turn long articles or PDFs into concise bullet points. Works without an API key, with optional LLM support.
Chat with a PDF using answers grounded in the document, with optional private AI if you opt in.
Compare a resume with a job description and list matching and missing skills before you apply.
Turn video or audio into editable text, SRT, VTT, and CSV in the browser. Spoken words use the local Whisper model; on-screen text uses the same Tesseract OCR as Image OCR.
Extract text from JPG, PNG, WebP, and PDFs in the browser. Searchable PDFs skip OCR when a text layer already exists.
Convert JSON, CSV, XML, and YAML in the browser with safe parsers, validation, and a table preview for tabular results.
Find duplicate rows, empty rows, extra spaces, and messy headers in CSV or XLSX, preview the effect, then download a clean file.
Compare original and changed text side by side or unified, with line or word highlight, file import, and structural JSON diff.
Parse URLs, edit query keys, encode or decode components, build campaign URLs, and remove selected tracking parameters.
Check title, description, and social tags from pasted metadata, or inspect a public URL through a fetch path that blocks private addresses.
Hash a file in the browser, copy checksums, and check an expected hex value without uploading the bytes.
Compare IANA time zones, highlight overlapping working hours, copy a schedule, and download an .ics invite locally.
Calculate WCAG contrast for text and background, convert HEX RGB HSL, preview UI samples, and suggest a nearby passing text color.
Scan logs, .env files, JSON, and YAML in the browser for API keys, JWTs, passwords, and connection strings, then download a safe copy.
Redact Windows usernames, home folders, machine names, IPs, emails, and tokens from stack traces in the browser before you paste them into a ticket.
Generate and check HMAC-SHA-256, SHA-384, and SHA-512 signatures in the browser. The HMAC secret never leaves the device.
Inspect patterns for nested quantifiers and catastrophic backtracking, then run matches in a web worker that is killed after a short timeout.
Draft a short disclosure for AI-assisted articles, images, videos, social posts, research, and reports. It describes process, not legal compliance.
Convert a rough request into Objective, Inputs, Constraints, Required Output, Quality Criteria, Edge Cases, Validation, and Examples. Export Markdown or JSON.
Split a restaurant or group bill equally or by item, add tax, service, and tip, then see who pays whom. Rounding stays visible. No loans or interest.
Build an .ics event with an IANA time zone, all-day dates, recurrence, and reminders. No Google or Microsoft sign-in. The same ICS writer is used by the document expiry tracker.
Track document names, expiry dates, reminder windows, and notes in this browser. Export ICS, CSV, or JSON. Status is Expired, Expires Soon, or Active. ID numbers are not required.
Fill optional contact fields, generate a QR code in your browser, verify the payload, and download PNG or PDF. Anyone who scans it can read the same fields. No server storage.
Batch-rename files with a preview table and templates. Download a ZIP or save to a folder. Only filename, type, date, and size are used. Contents are not inspected to choose names.
Build a room-by-room household list in this browser. Optional photos stay in IndexedDB. Export CSV, XLSX, JSON, or PDF. Totals are not an insurance valuation.
Turn a photo of a paper document into a clean, straightened scan in your browser. Crop four corners, apply a conservative filter, and download JPG, PNG, or a multi-page PDF.
Create properly sized passport, visa, and ID photos from an existing picture in your browser. Profiles cite official pages. Acceptance is never guaranteed.
Extract merchant, date, lines, and totals from a receipt or invoice photo with local OCR. You review every field. Download CSV, XLSX, or JSON. No currency conversion.
Turn screenshots into a step-by-step guide in your browser. Add titles and notes, hide a region, then download PDF, HTML, or a ZIP.
Pretty-print, minify, validate, search, and inspect XML in your browser with a tree, copyable XPath, and a local XPath tester.
Pretty-print, validate, and inspect YAML in your browser. Duplicate keys are reported with a line number. Unsafe tags are rejected.
Format JavaScript, TypeScript, HTML, CSS, SCSS, Markdown, GraphQL, JSON, XML, and YAML in your browser. Code is not executed and is not uploaded.
Use Google Gemini from DevNestro for questions and drafts. Messages are sent to Google. DevNestro is not an official Google product.
Generate emails, outlines, and article drafts with Google Gemini. Your brief is sent to Google. Review every fact before you publish.
Send source text to Google Gemini for a short or long summary. This is cloud AI, not DevNestro’s local TextRank summarizer.
Rewrite a paragraph with Google Gemini in a simpler, more formal, or shorter style. The original text is sent to Google.
Send a draft to Google Gemini for grammar and clarity suggestions. Corrections are not guaranteed. Cloud processing only.
Translate text with Google Gemini, including English, Urdu, and Arabic. Source text is sent to Google. Not a certified translation.
Ask Gemini for a JSON object with the keys you list. Missing facts should be null. The source is sent to Google.
Send a snippet or a programming question to Google Gemini. Review every suggestion. Do not paste secrets.
Upload a PDF or supported document to Google Gemini for a summary, dates, people, or a custom question. The file is sent to Google. Not processed locally.
Upload a PDF and ask Google Gemini questions about it. The file is sent to Google and kept only for the session. Page numbers are not guaranteed.
Upload two or more documents and ask Gemini what matches, differs, or went missing. Files are sent to Google. This is not legal advice.
Create a per-session Gemini File Search store, ask semantic questions, and delete the store. Embeddings can persist at Google until that delete runs. Not processed locally.
Paste a long text or upload a large supported file for a Gemini summary, timeline, or structured outline. Content is sent to Google. Context caching is off on the free-tier default.
Upload a JPG, PNG, WebP, or GIF to Google Gemini for a description, objects, screenshot recap, or a custom question. The image is sent to Google. Not processed locally.
Use Gemini vision to extract visible text from a photo. This is AI-assisted text extraction, not traditional OCR. The image is sent to Google.
Generate short alt text, a detailed description, a social caption, or an accessibility description with Google Gemini. Edit before you copy. The image is sent to Google.
Create an image from a prompt with the configured Gemini image model. Prompts are sent to Google. Results are AI-generated and may be inaccurate or fictional.
Upload an image and describe a change such as background, object, or style. Gemini returns an edited preview. The file is sent to Google. Editing is not pixel-perfect.
Upload MP3, WAV, M4A, or another supported recording to Google Gemini for a summary, speakers, topics, tone, or a custom question. The audio is sent to Google. Not processed locally.
Use Gemini to produce an AI-assisted transcript from uploaded audio. The file is sent to Google. This is not the local Video & Audio Text Extractor.
Create speech from pasted text with the configured Gemini TTS model. Text is sent to Google. Results are AI-generated voices, not a recording of a real person.
Start a short live voice session with Google Gemini. Microphone audio is sent to Google. Limited to 3 sessions per hour. Not processed locally.
Start a short live camera session with Google Gemini. Frames and microphone audio are sent to Google. Limited to 3 sessions per hour.
Upload MP4, WebM, MOV, or another supported clip to Google Gemini for a description, events, audio-visual notes, timestamps, extracted facts, or a question. The video is sent to Google. Not processed locally.
Upload a short video to Google Gemini for a short summary, detailed recap, chapters, key moments, timeline, or action items. The file is sent to Google. Timestamps are approximate.
Upload a video once, then ask Google Gemini questions about it. The file is sent to Google and kept for the session. Timestamped answers are not guaranteed.
Paste a public YouTube URL for a Gemini summary, topics, timeline, questions, learning notes, or quiz. DevNestro does not download or rip the video. Analysis only.
Create a short video from a prompt with the configured Gemini Veo model. Prompts are sent to Google. The free tier fails closed. Limited to one generation per hour.
Upload a clip and describe a change for the configured Gemini video model. Editing is not assumed available. The free tier and a disabled flag fail closed. Text-only models are not used to fake an edit.
Ask a question with Google Search grounding through Gemini when a paid host is configured. Queries are sent to Google. The free tier fails closed. Limited to five Search requests per hour.
Paste a public http or https URL for Gemini URL-context analysis. DevNestro does not fetch the page. Localhost, private IPs, metadata hosts, and file URLs are rejected.
Ask about a place or area with Google Maps grounding through Gemini when a paid host is configured. Queries are sent to Google. The free tier fails closed. Limited to five Search requests per hour.
Paste a CSV or upload a data file for Gemini analysis. Code runs at Google, not on DevNestro. Results are drafts. Verify important numbers.
Ask Gemini for arithmetic, statistics, or a formula walkthrough. The problem is sent to Google. Loan, mortgage, APR, interest, and gambling questions are refused.
Compare two passages with gemini-embedding-2. Texts are sent to Google. A high cosine score is not proof they mean the same thing.
Index a list of texts with gemini-embedding-2 and rank a query. Vectors stay in memory for the session and are not written to disk.
Compare text or a text document with Gemini embeddings. Image, audio, and video combinations fail closed on gemini-embedding-2. Not processed locally.
Send a prompt and a JSON function schema to Gemini. DevNestro displays the requested function and arguments. It does not execute user-defined code. Cloud AI.
Select Google Search, URL context, code execution, File Search, or structured output. Search is paid-only. DevNestro does not run server commands. Cloud AI.
Remote MCP is disabled by default. Public users cannot point DevNestro at an MCP URL. The page fails closed instead of opening an SSRF path. Not processed locally.
Paste prompts or upload JSONL for the Gemini Batch API on a paid host. Check status and download results. Free tier fails closed. Not processed locally.
Create a temporary Gemini context cache from a large source and ask multiple questions. Paid host only. Not processed locally.
Inspect PDF, DOCX, images, and text in your browser for PII, secrets, metadata, links, QR codes, and Content Credentials before you share.
Create a professional invoice in your browser with live preview, templates, and decimal-safe totals. Download PDF or print. Nothing is stored on the server.
Create quotes and estimates with the same decimal-safe totals engine as invoices, without invoice-only due and payment wording.
Decode a QR image in your browser, classify the payload, and review URL risk indicators. Links are never opened automatically.
Add a text or image watermark to a PDF in your browser. Presets for CONFIDENTIAL, DRAFT, COPY, and SAMPLE. Download a new file.
Add page numbers to a PDF in your browser with formats like Page 1 of N, custom prefix/suffix, six positions, and skip-first.
Password-protect a PDF with PdfSharp encryption. The file is processed briefly on the server, never stored, and passwords are not logged.
Compress a PDF in your browser with Recommended, Maximum Compression, or Best Quality. Original, compressed, and saved size appear only after processing.
Remove image backgrounds in your browser with a lazily loaded AI model. Export a transparent PNG with optional white, black, color, or image backgrounds.
Build a resume with personal, summary, experience, education, skills, projects, certifications, languages, and custom sections. Live preview, PDF, print, and IndexedDB drafts.
Upload CSV or Excel, choose a sheet and axes, render bar, line, pie, doughnut, area, or scatter charts, then export PNG, SVG, or PDF.
Batch resize, compress, convert, rename, rotate, and remove metadata for up to about 100 images, then download a ZIP with per-file status.
Securely redact a PDF in your browser by rebuilding marked pages as images, then verify the marked text is gone from extraction before you download.
Upload a design, pick a platform surface, and preview Desktop, Mobile, or TV guides for safe area, crop, profile, caption, and button overlays. Presets carry a last-verified date.
Upload JPG, PNG, WebP, PDF, or video and get a Critical / Recommendations / Passed report that reuses metadata, GPS, PII, secrets, OCR, Content Credentials, and safe-area checks where the format applies.
Inspect an XLSX in your browser for formula pattern breaks, hardcoded values in formula regions, #REF! and friends, external links, hidden sheets/rows/cols, empty refs, and suspicious ranges. Audit only — no auto-fix.
Build title, description, canonical, robots, Open Graph, and Twitter tags, then copy or preview the HTML. Length tips are informational only.
Generate Article, FAQPage, Product, Organization, LocalBusiness, BreadcrumbList, Person, WebSite, and Event JSON-LD with JSON validation. No rich-result guarantees.
Generate User-agent, Allow, Disallow, and Sitemap lines, including crawler-specific groups. Only standard directives are emitted without unexplained nonstandard rules.
Paste robots.txt, a path, and a user-agent to get Allowed, Blocked, or No Matching Rule with the matched rule using longest/specific matching.
Create a urlset sitemap from manual URLs or CSV/text upload with loc and optional lastmod. Automatic site crawling is skipped in V1.
Paste, upload, or fetch a public sitemap to check XML validity, root element, duplicates, missing loc, counts, size, and nested indexes. DTD/external entities are disabled.
Inspect status codes, detect loops, note HTTP→HTTPS upgrades, and show the final URL using SSRF-safe fetching with re-validation on every hop.
Inspect status, content-type/length, cache, etag, last-mod, CSP, HSTS, XFO, referrer, permissions, XCTO, CORS, and Server — with explanations, never a “website is secure” claim.
Generate hreflang link tags from language/region + URL rows, including optional x-default, and flag basic BCP 47 / absolute URL issues.
Fetch a public page and inspect canonical link tags and Link headers for self-reference, multiples, cross-domain, relative/absolute, and HTTP/HTTPS issues.
Evaluate robots.txt against GPTBot, ClaudeBot, Google-Extended, PerplexityBot, and other documented agents. Explains that robots.txt is a preference, not a hard guarantee.
Detect type from signatures where possible, summarize size and metadata, and open recommended tools or Smart Workflows without re-uploading.
Learn how reference exchange rates differ from bank rates, how converters multiply amounts, and what history charts show.
Plan a book trailer from your cover and blurb, choose aspect ratio, write a hook, and export a social-ready promo without inventing awards.
Find English definitions, parts of speech, and phonetics from open dictionary data with attribution. DevNestro does not scrape proprietary lexicons.
Browse synonyms and antonyms from open dictionary senses, with optional Gemini tone groups that are explicitly labeled as AI.
Check grammar and try tone rewrites with cloud AI. Drafts are sent to Google when you run a check and are not stored as a grammar cache.
Generate perfect and near rhymes with a suffix-based matcher over DevNestro’s open English word list.
Find words by starts-with, ends-with, contains, length, letters, and wildcards on an open English list. Generic word-game helper only.
Create style-based example sentences with Gemini. Outputs are labeled AI examples, never dictionary citations.
Use browser SpeechSynthesis plus open-data IPA when available, with a heuristic syllable estimate and a link to Text to Speech for longer passages.
Generate topic and difficulty quizzes with Gemini multiple-choice questions. Instant feedback in session — no gradebook claims.
See today’s English word — the same for everyone — chosen deterministically from an open list, with open-data definitions and optional AI explanation.
Ask Gemini what an informal phrase likely means, including register and region notes. Labeled AI, not a slang dictionary of record.
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